End User License Agreement#

Lactuca — Life Actuarial Calculation Library for Python

Effective date: 2026-04-20. Last updated: 2026-04-21.

Licensor identification (Art. 10 Ley 34/2002, LSSI-CE):

Alberto Aragoneses Nebreda (trading as Actuaan) NIF: 09180714B Address: Francesc Pérez Cabrero, 7, 08021, Barcelona, SPAIN Email: support@lactuca.io Website: www.lactuca.io

Alberto Aragoneses Nebreda is a self-employed professional (autónomo) registered with the Spanish Social Security (RETA) and tax authority (AEAT). For the purposes of the Spanish Information Society Services Act (Ley 34/2002, LSSI-CE), Alberto Aragoneses Nebreda is the prestador de servicios de la sociedad de la información.

By downloading, installing, activating, or using Lactuca (”Software”), you (”Licensee”) agree to be bound by this End User License Agreement (”Agreement”). If you do not agree, do not install or use the Software.

0. Parties and Contractual Structure#

0.1 Payment and Merchant of Record#

Purchases of paid Lactuca licenses (Individual, Team, and monthly Enterprise plans) are processed by Lemon Squeezy (LSFS Inc.), which acts as the Merchant of Record for those transactions. The commercial relationship governing payment, invoicing, VAT, and refunds applicable to the payment transaction is between Licensee and Lemon Squeezy. Lemon Squeezy’s own terms of service and privacy policy apply to that payment transaction.

Free Trial licenses are available at no charge and may be requested through the Software’s activation prompt at first launch. They are not processed through Lemon Squeezy, and no payment data is collected or processed by Licensor for the Trial tier.

Academic & Community licenses are granted directly by Licensor by email request (support@lactuca.io) and are not processed through Lemon Squeezy. No payment data is collected or processed by Licensor for these tiers.

Enterprise annual contracts are entered into directly between Licensee and Licensor by means of a separate written agreement (Order Form or Master License Agreement). Lemon Squeezy is not involved in those transactions (see §11.5).

In the event of any conflict between this Agreement and Lemon Squeezy’s terms regarding the scope of the license or the permitted use of the Software, this Agreement prevails with respect to the license.

1. Grant of License#

Subject to the terms of this Agreement and payment of applicable fees (or acceptance of a free trial or academic grant), Licensor grants Licensee a limited, non-exclusive, non-transferable, non-sublicensable license to:

(a) install and use the Software on Licensee’s own devices for any professional, academic, or research purpose; and

(b) integrate the Software into Licensee’s own applications, systems, pipelines, or products, including applications that are distributed or sold to third parties, provided that:

(i)  the Software is not made available to end users as a standalone
     actuarial library or package — it must remain embedded and
     inaccessible as an independent component; and

(ii) a valid Lactuca license covers every machine (device) on which
     the Software is installed and executes. The applicable licensing
     model depends on the deployment scenario:

     - **Direct installation** (the Software is installed on each
       user's own machine): each device requires a license under
       an appropriate tier (Individual, Team, or Enterprise).

     - **Server or shared deployment** (the Software is installed on
       a server or shared infrastructure and accessed by users through
       an application, API, or pipeline without being installed on
       their individual devices): the license applies to the server
       device(s) on which the Software runs. An Enterprise license
       covers all of Licensee's internal users accessing the Software
       through such shared infrastructure, subject to the device
       limit of the tier. No individual license is required for each
       end user solely because they interact with an application that
       calls the Software server-side.

     The technical license enforcement mechanism (§5) validates the
     license on the machine where the Software is installed. The
     Software will not function on any unlicensed device.

Licensee’s right to integrate and distribute under (b) does not extend to:

  • redistributing the Software (or any part thereof) as a standalone library, package, or SDK, whether free of charge or commercially;

  • creating or commercialising a product that is substantially derived from, or directly competes with, the Software as an actuarial calculation library.

OEM and redistribution to external users — separate contract required.

Use of the Software in any product or service distributed or made available to users external to Licensee’s own organisation constitutes OEM use and is strictly prohibited under any standard license tier without a separate written OEM Agreement. See §16 for the full definition, compliance obligations, and how to obtain an OEM license.

The number of licensed users and devices is determined by the tier acquired:

Tier

Activation pool

Concurrent sessions

Trial

1

1

Individual

1

1

Team

10

10

Enterprise

50

50

Academic & Community

1

1

OEM

per agreement

unlimited

“Device” means a single physical or virtual machine, including servers and container hosts. Shared servers and container environments count as one device per host, regardless of the number of concurrent processes or users on that host.

“Licensee’s organisation” means, for Team and Enterprise licensees, the legal entity that entered into this Agreement, including any subsidiary or affiliated entity in which that legal entity holds more than 50% of the voting rights or ownership interest. Use of the Software by employees or contractors of such majority-controlled entities constitutes internal use and does not require a separate license, provided total activation slots across all included entities remain within the limits of the acquired tier. Entities in which Licensee holds 50% or less are not covered and require a separate license.

The activation pool is the technically enforced device limit (via Keygen.sh): each activated device consumes one slot. The concurrent sessions limit is a separately enforced concurrent-session tracking constraint: only the stated number of instances of the Software may run simultaneously across all activated devices at any one time. An instance that cannot obtain a session slot fails to start with an error message indicating all seats are in use. The session slot is released automatically when the instance exits normally, or when the license server detects the instance has stopped sending keep-alive signals (see §6.1). Any tier may cover a shared server for internal users — the server consumes one activation slot, and internal users accessing Lactuca through that server do not each require a separate license key (see §1(b)(ii)). Users external to Licensee’s own organisation are not covered by any standard tier; see §16.

2. Free Trial#

2.1 Trial terms#

Licensor offers a free 30-day trial of the Software (”Trial”). The Trial is available to any Licensee who has not previously activated a paid license or a prior Trial using the same email address or on the same device.

During the Trial, all provisions of this Agreement apply, except that:

(a) no payment is required; and

(b) the Trial automatically expires 30 days after the license key is issued; the Software will cease to function after expiry.

2.2 No automatic conversion#

The Trial does not automatically convert into a paid subscription upon expiry. Licensee must separately purchase a paid plan to continue using the Software after the Trial period. No charge is made at the end of the Trial without Licensee’s affirmative act of purchase.

2.3 Trial limitations#

The Trial is limited to 1 device activation and 1 concurrent session. All restrictions in §3 apply during the Trial. Trial licenses do not include upgrade rights beyond the trial period.

2.4 One trial per person and per device#

The Trial is limited to one per person and per device. Attempts to circumvent this limit (e.g. by registering multiple email addresses or manipulating hardware identifiers) constitute a material breach of this Agreement.

2.5 Personal data during the Trial#

The Trial is not processed through Lemon Squeezy. By requesting a trial key through the Software’s activation prompt, Licensee explicitly consents (GDPR Art. 6(1)(a)) to the processing of the following personal data, each for the specific purpose indicated:

  • Email address: to deliver the trial key and manage the trial period.

  • Name (optional — only processed if provided): to personalise the trial key delivery email.

  • Hardware fingerprint hash (§5.2): to enforce the per-device activation limit.

  • Connection metadata transmitted in outbound HTTP requests during trial registration (to the Vercel-hosted trial webhook) and during license activation and keep-alive (to the Keygen.sh API, §5.6) — comprising the license identifier, hardware fingerprint hash, timestamps, and the IP address necessarily included in any outbound HTTP request — for the purpose of delivering the license and enforcing the concurrent-session limit during the trial period.

Each purpose is separately consented to. Consent to each purpose is required for the Trial to function as described.

This consent may be withdrawn at any time by contacting support@lactuca.io. Withdrawal of consent will result in immediate deactivation of the Trial key. To facilitate withdrawal, Licensee may also use the opt-out link included in the trial key delivery email. Pursuant to Art. 7(3) GDPR, withdrawal of consent shall not affect the lawfulness of processing based on consent before its withdrawal.

2.6 Withdrawal right and Trial#

The Trial is provided free of charge; no payment obligation arises and no right of withdrawal under Art. 16(m) of Directive 2011/83/EU is applicable to the Trial itself. If Licensee subsequently purchases a paid subscription, §9 of this Agreement applies to that purchase.

3. Restrictions#

Licensee may not:

(a) Copy, modify, merge, publish, or distribute the Software except as expressly permitted herein. Nothing in this clause prohibits Licensee from making a single backup copy of the Software to the extent permitted by Art. 5(2) of Directive 2009/24/EC (Art. 99(a) TRLPI), as a mandatory right that cannot be excluded by contract.

(b) Reverse-engineer, decompile, disassemble, or otherwise attempt to derive the source code, algorithms, or cryptographic material from any compiled binary component of the Software (.so, .pyd, or any other compiled extension), except solely to the extent required by mandatory applicable law that cannot be excluded by agreement (including the interoperability right under Art. 6 of Directive 2009/24/EC, subject to its statutory conditions). Before exercising any such right, Licensee shall first request the relevant technical information from Licensor in writing.

(c) Circumvent, disable, or tamper with any license validation mechanism, digital signature, hardware fingerprint check, or concurrent-session keep-alive signal embedded in or used by the Software. This prohibition does not apply to the extent strictly necessary to exercise mandatory rights under applicable law (including the interoperability and backup rights under Arts. 5–6 of Directive 2009/24/EC).

(d) Transfer, assign, sublicense, rent, lease, lend, or otherwise convey the license or any activation key to any third party. Individual and Academic & Community licenses are strictly personal. Team and Enterprise licenses may not be transferred outside the contracting organization.

(e) Use the Software for any unlawful purpose or in violation of any applicable law or regulation.

4. Academic & Community License Restrictions#

Licenses issued under the Academic & Community tier are granted exclusively for non-commercial, academic, research, or open-source community use. The following uses are strictly prohibited under an Academic & Community license:

  • Client-facing consulting engagements or deliverables billed to third parties.

  • Integration into production systems used by or on behalf of commercial entities.

  • Any activity that generates revenue, directly or indirectly.

Violation of this clause constitutes a material breach and results in immediate revocation of the license. No refund or compensation is payable as no payment was made for this tier.

5. Activation, Hardware Fingerprint, and Technical Protection Measures#

5.1 Technical protection measures#

The Software incorporates a license management system (powered by Keygen.sh) that requires a valid license key to operate. The following technical protection measures are in place:

Measure

Purpose

Hardware fingerprint (one-way hash)

Enforce per-device activation limits

Digitally signed local license file

Prevent license file tampering

Periodic online validation (every 30 days)

Detect unauthorised key sharing

Concurrent session tracking (keep-alive approximately every 10–20 min, tier-dependent)

Enforce concurrent session limits per tier

Compiled-only binary distribution (no source code)

Protect proprietary implementation

5.2 Hardware fingerprint#

Activation involves the collection of a hardware fingerprint: a one-way cryptographic hash derived from hardware attributes of the device (MAC address, hostname, CPU architecture). The raw hardware values are never transmitted — only the irreversible hash is sent to and stored by Keygen.sh. The resulting hash constitutes pseudonymous data within the meaning of Art. 4(5) GDPR: it cannot directly identify Licensee as an individual without access to additional information that Licensor does not retain.

5.3 Interoperability#

The Software is compatible with:

  • Operating systems: Windows 10/11 (x86-64), macOS 11+ (ARM64), Linux (glibc 2.28+, x86-64)

  • Python versions: 3.12 and above

  • Dependencies: installed automatically by pip; the current list and minimum version requirements are published in the installation guide

The Software does not require any system-level driver or kernel extension. It does not interoperate with any third-party actuarial software.

5.4 Hardware replacement#

If Licensee replaces or substantially modifies a device’s hardware, the existing activation on that device will be invalidated. Licensee may deactivate devices and re-activate on new hardware as described in the activation documentation. The total number of simultaneously active devices may not exceed the limit for the applicable tier at any time.

5.5 Privacy#

Full details of what personal data is collected and how it is processed are set out in the Privacy Policy, which forms an integral part of this Agreement.

5.6 Personal data transmitted during concurrent session tracking (keep-alive)#

In addition to the activation-time data described in §5.2, each running instance of the Software transmits a keep-alive HTTP request (heartbeat) to the Keygen.sh API approximately every 10 minutes on single-seat tiers and every 20 minutes on Team and Enterprise (§6.1(b)). Each such request contains:

  • The license key identifier (or a non-reversible hash thereof);

  • The hardware fingerprint hash (§5.2) of the device running the process;

  • A timestamp of the request; and

  • The IP address of the device, which is necessarily included in any outbound HTTP request.

No raw hardware values, user names, email addresses, or application-layer data are transmitted in heartbeat requests.

Legal basis: For paid licensees this processing is based on Art. 6(1)(b) GDPR (performance of the contract). For Trial licensees the basis is Art. 6(1)(a) GDPR (consent given under §2.5). Keygen.sh processes this data solely as a data processor within the meaning of Art. 28 GDPR pursuant to a Data Processing Agreement with Licensor. The transfer to Keygen.sh (United States) is carried out on the basis of Standard Contractual Clauses (Commission Implementing Decision (EU) 2021/914). Licensee acknowledges that this functionality is provided by Keygen.sh (Keygen LLC) under its own Terms of Service and Privacy Policy. Full details of retention periods and sub-processor arrangements are set out in the Privacy Policy, which forms an integral part of this Agreement (§5.5).

If Licensor becomes aware of a material change to Keygen.sh’s data practices that reduces the level of protection described in this section, Licensor will notify active subscribers by email within 30 days of becoming aware. Enterprise subscribers on an annual direct contract who do not wish to continue under modified conditions may terminate within 30 days of notification and receive a pro-rata refund of any prepaid annual fee (§13.2).

6. Offline Grace Periods and Service Continuity#

6.1 Offline grace periods#

The Software maintains two independent offline grace periods:

(a) License validation grace period (30-day revalidation interval): the Software attempts to revalidate the license online approximately every 30 days. If no internet connection is available at revalidation time, the Software may continue to operate while the locally stored license has not yet reached its expiry date, subject to periodic warnings on startup. There is no additional offline cutoff beyond the stored expiry date. Once the expiry date stored locally is exceeded, the Software will not operate regardless of network availability.

(b) Concurrent session grace period (3 days): each running instance of the Software sends a keep-alive signal to the license server approximately every 10 minutes on single-seat tiers and every 20 minutes on Team and Enterprise to maintain its active session. If the server cannot be reached:

- A **process already running** at the time of network failure
  continues to operate without interruption for its full lifetime.

- A **new startup** of the Software is permitted without network
  access for up to **3 days** from the last successful server
  contact. After 3 continuous days without connectivity, new startups
  will fail with a connection error until the network is restored.

Both grace periods are independent. In practice, the concurrent session grace period (3 days) is the binding constraint when the network is unavailable for an extended time.

6.2 Service continuity commitment#

Licensor undertakes to maintain the online license validation service (currently provided by Keygen.sh) for the duration of any active paid subscription. In the event that Licensor is unable to maintain the validation service (whether due to discontinuation of the Software, a change of license management provider, or any other reason), Licensor will:

(a) provide Licensee with at least 90 days’ prior written notice by email; and

(b) at Licensee’s option, either: (i) issue a perpetual offline activation that does not require online validation for the remainder of the paid period; or (ii) offer a pro-rata refund of any unexpired prepaid subscription.

6.3 Provider migration#

If Licensor migrates to a new license management provider, existing license keys will remain valid without requiring Licensee to re-purchase. Licensor will provide migration instructions at least 30 days before any key migration is required.

7. Updates and Version Policy#

Paid subscriptions include all minor and patch releases within the subscribed major version. Major version upgrades may require a separate license or subscription renewal. Licensor reserves the right to define the boundary between minor and major releases. Free Trial licenses do not include upgrade rights beyond the Trial period.

Notwithstanding the above, security updates necessary to maintain the conformity of the Software will be supplied to consumer licensees in the EU/EEA without additional charge for the duration of the active subscription, regardless of whether they are classified as minor or major releases, as required by Art. 8 of Directive 2019/770/EU (implemented in Art. 115 quater TRLGDCU).

8. Suspension and Termination for Cause#

8.1 Grounds#

Licensor may suspend or terminate this Agreement, with immediate effect and written notice to Licensee, if Licensee:

(a) materially breaches any provision of this Agreement and, where the breach is capable of remedy, fails to remedy it within 14 calendar days of written notice from Licensor specifying the breach;

(b) deliberately circumvents, disables, or tampers with any license validation or copy-protection mechanism;

(c) provides materially false information during the trial registration or purchase process; or

(d) intentionally and repeatedly exceeds the device-count or concurrent-session limits of the licensed tier, or deliberately circumvents the concurrent-session tracking mechanism described in §5.1 and §6.1(b) (for example, by patching or disabling the keep-alive signal mechanism) in order to obtain more concurrent sessions than permitted.

A single unintentional excess of the device limit (e.g. caused by hardware failure and replacement) does not constitute grounds for termination; Licensor will first request that Licensee deactivate the excess device.

8.2 Refund on termination for cause#

Where Licensor terminates this Agreement pursuant to §8.1:

(a) Monthly subscribers: no refund is payable; the license remains active until the end of the current billing period, after which access is revoked.

(b) Annual direct-contract subscribers (Enterprise and OEM annual contracts only): Licensor shall refund the pro-rata unused portion of the prepaid annual fee, calculated from the date of termination, except where the termination is caused by deliberate circumvention (§8.1(b)), the provision of materially false information (§8.1(c)), intentional circumvention of the concurrent-session tracking mechanism (§8.1(d)), or OEM misuse in violation of §16 (use of the Software to serve users external to Licensee’s own organisation without an OEM Agreement), in which case no refund is payable.

8.3 Notification#

Licensor will notify Licensee by email of any suspension or termination. Where the breach is capable of remedy under §8.1(a), Licensor will provide the 14-day cure notice before taking any action that disables the Software.

9. Right of Withdrawal (EU and EEA Consumers — Paid Licenses Only)#

This section applies exclusively to paid license purchases processed through Lemon Squeezy (Individual and Team plans, and monthly Enterprise plan). It does not apply to Free Trial activations (see §2.6), Academic & Community licenses (no payment), or Enterprise annual contracts (see §11.5).

9.1 Statutory right of withdrawal#

Consumers resident in the European Union or the European Economic Area normally have a statutory 14-day right to withdraw from distance contracts under Directive 2011/83/EU and the applicable national implementing legislation (in Spain: Real Decreto Legislativo 1/2007, Arts. 68–79 TRLGDCU).

9.2 Waiver upon activation or download of digital content#

However, pursuant to Art. 16(m) of Directive 2011/83/EU (and Art. 103(m) TRLGDCU for consumers in Spain), the right of withdrawal does not apply to contracts for the supply of digital content not supplied on a tangible medium where:

(a) performance has begun with the consumer’s prior express consent; and

(b) the consumer has acknowledged that they thereby lose the right of withdrawal.

By completing the purchase through Lemon Squeezy and activating or downloading the Software, Licensee:

(i) gives prior express consent to the immediate supply of the digital content (Lactuca); and

(ii) acknowledges that, once the license key has been delivered and the download or activation process has commenced, the right of withdrawal is lost.

These acknowledgements are recorded by Lemon Squeezy at the time of checkout and are available on request from support@lactuca.io.

For the avoidance of doubt, the waiver set out in this §9.2 does not affect or limit Licensee’s rights in respect of lack of conformity of the Software under Directive 2019/770/EU and §10.1 of this Agreement. Those conformity rights are independent of the right of withdrawal and remain fully unaffected.

9.3 Refund before activation#

If Licensee has purchased a license but has not yet activated or downloaded the Software, Licensee may request a full refund within 14 calendar days of purchase by contacting support@lactuca.io. Once activation has commenced, the waiver in §9.2 applies.

9.4 Consumers outside the EU/EEA#

For consumers outside the EU/EEA, refund eligibility is governed by Lemon Squeezy’s standard refund policy, which applies as Merchant of Record. Licensor’s refund obligations are limited to those imposed by mandatory law in the relevant jurisdiction.

10. Warranties and Limitation of Liability#

10.2 Professional responsibility of the Licensee (all tiers)#

The Software is a professional actuarial calculation tool intended for use by or under the direct supervision of qualified actuaries. By using the Software, Licensee warrants that they have the professional competence required to:

(a) understand the actuarial methods, assumptions, and formulas implemented in the Software, as documented in the technical documentation;

(b) assess the appropriateness of those methods and assumptions for the specific purpose for which the Software is being used;

(c) independently verify and validate all calculation results before relying on them for any professional, regulatory, statutory, or supervisory purpose; and

(d) take sole professional responsibility for any conclusions, opinions, reports, or decisions based on the Software’s output.

Licensee acknowledges that the Software implements general actuarial methods based on international actuarial practice and applicable Spanish and international actuarial standards, but that actuarial calculations performed with the Software are not a substitute for an independent actuarial opinion, review, or certification by a duly qualified actuary.

10.3 No warranty for specific regulatory purposes (all tiers)#

The Software is not certified, approved, or validated by any regulatory authority. Licensor expressly disclaims, to the fullest extent permitted by applicable law, any warranty or representation — express, implied, or statutory — that the Software or any output thereof is suitable, appropriate, or sufficient for any specific regulatory, supervisory, statutory, or compliance purpose, including without limitation:

  • IFRS 17 (International Financial Reporting Standard 17 — Insurance Contracts): present value of future cash flows, risk adjustment, contractual service margin (CSM), best estimate liabilities (BEL), or any other IFRS 17 measurement model (GMM, PAA, VFA);

  • Solvency II: Solvency Capital Requirement (SCR), Minimum Capital Requirement (MCR), best estimate of technical provisions, risk margin, standard formula modules (mortality, longevity, disability, lapse, expense), internal model validation, or ORSA;

  • Spanish technical provisions (Provisiones técnicas del seguro de vida, Reglamento de Ordenación y Supervisión de los Seguros Privados): mathematical reserves (reserva matemática), actuarial equivalence, or any other provision required under ROSSP or DGSFP regulations;

  • any other statutory, regulatory, supervisory, or reporting requirement imposed by any competent authority in any jurisdiction.

Use of the Software in connection with any of the above purposes does not relieve Licensee of the obligation to obtain independent actuarial review and certification where required by applicable law, regulation, or professional standards (including the standards of the Instituto de Actuarios Españoles or any other competent actuarial association).

Licensor’s liability for any loss, damage, penalty, fine, or regulatory sanction arising from Licensee’s reliance on the Software for any of the purposes listed above, without the independent verification required by §10.2, is excluded to the fullest extent permitted by applicable law.

10.4 Limitation of liability (B2B and non-consumer use)#

This section applies in addition to §10.2 and §10.3, and independently of the consumer guarantee in §10.1. Where Licensee uses the Software exclusively in the course of a trade, business, or profession (i.e. as a non-consumer), the Software is provided “as is” without any implied warranties of merchantability, fitness for a particular purpose, or non-infringement, to the fullest extent permitted by applicable law. Licensor’s total aggregate liability for any claim arising under or related to this Agreement shall not exceed the amounts paid by Licensee in the twelve months preceding the claim.

This limitation does not apply to liability for:

(a) death or personal injury caused by Licensor’s negligence;

(b) fraud or fraudulent misrepresentation;

(c) any other liability that cannot be limited or excluded by applicable law.

10.5 Availability#

Licensor does not warrant uninterrupted availability of the Software or the license validation service. Temporary unavailability of the online validation server does not constitute a lack of conformity, provided the offline grace period in §6.1 remains effective.

11. Subscription, Renewal, and Cancellation#

11.1 Monthly subscriptions#

Monthly subscriptions renew automatically on the same day of each calendar month. Licensee may cancel at any time through the Lemon Squeezy customer portal (accessible via the link in any subscription confirmation email). Cancellation takes effect at the end of the current billing month; no refund is payable for the remaining days of the current month.

11.2 Annual subscriptions (Individual and Team)#

Annual subscriptions renew automatically 12 months after the initial purchase date. Licensor will send a renewal reminder email at least 14 days before the renewal date. Additionally, the Software displays an in-app warning message when 30 days or fewer remain before expiry. Licensee may cancel before the renewal date through the Lemon Squeezy customer portal; no refund is payable for the current annual period already paid, unless §10.1 or §13.2 applies.

11.3 Price changes#

Licensor may change subscription prices with at least 30 days’ notice before the next renewal date. If Licensee does not accept the new price, Licensee may cancel before the next renewal date without penalty.

11.4 Effect of cancellation or non-renewal#

Upon cancellation or non-renewal:

(a) The license key remains active until the end of the paid period.

(b) After expiry, the Software will display a license error and cease to function until a new license is activated.

(c) Locally stored license files may be deactivated by Keygen.sh after the grace period expires.

11.5 Enterprise annual contracts#

Enterprise subscriptions — whether billed monthly through Lemon Squeezy or annually through a direct contract — confer identical usage rights: the same activation pool (150 machine activations), the same maximum of 50 concurrent sessions, and the same permitted deployment scenarios (direct workstation installation and server/shared deployment for internal users). The difference between monthly and annual Enterprise is solely the billing channel and contractual formality. Annual Enterprise subscriptions are governed by a separate written agreement (Order Form or Master License Agreement) entered into directly between Licensee and Licensor, outside the Lemon Squeezy platform. The terms of cancellation, renewal notice period, refund policy, and service level commitments are set out exclusively in that separate agreement. In the event of any conflict between this Agreement and the Enterprise contract, the Enterprise contract prevails with respect to the Enterprise Licensee’s subscription terms.

12. Intellectual Property#

The Software compiled binaries, stub files (.pyi), and documentation are the exclusive intellectual property of Alberto Aragoneses Nebreda. All rights not expressly granted herein are reserved. This Agreement does not convey any ownership interest in the Software.

The Lactuca table format (.ltk binary format specification and all code that reads, writes, or interprets .ltk files) is the exclusive intellectual property of Alberto Aragoneses Nebreda.

The actuarial data values contained in the bundled .ltk files are derived from public sources (including tables published by the Instituto de Actuarios Españoles, the Dirección General de Seguros y Fondos de Pensiones, and equivalent international bodies). Those factual values are not claimed as intellectual property of Licensor.

The documentation (text, formulas, and examples in docs/) is licensed separately under CC BY 4.0, unless otherwise noted.

13. Changes to this Agreement#

13.1 Notice of changes#

Licensor may update this Agreement at any time. Licensee will be notified of any material change:

(a) by email to the address provided at registration, at least 30 days before the change takes effect; and

(b) by a prominent notice on this documentation page.

13.2 Acceptance or rejection by paid subscribers#

If Licensee is a paid subscriber (Individual, Team, or Enterprise) and does not accept the modified terms, Licensee may terminate the agreement before the effective date of the change. In that case:

  • Monthly subscribers: entitled to use the Software until the end of the current billing month; no further charges will be made.

  • Annual subscribers: entitled to a pro-rata refund of the unused portion of their prepaid annual subscription, calculated from the effective date of termination.

Continued use of the Software after the effective date constitutes acceptance of the updated terms, provided Licensee received the notice under §13.1(a) and did not exercise the termination right within the 30-day notice period.

13.3 Non-material changes#

Changes that merely correct typographical errors, update contact details, or clarify existing terms without altering substantive rights are effective immediately upon publication and do not require a 30-day notice period.

13.4 Trial and Academic & Community licensees#

Trial and Academic & Community licenses are granted at no charge. Licensor may modify the applicable terms at any time with reasonable notice. Continued use after notice constitutes acceptance. If Licensee does not accept the modified terms, they must cease using the Software.

For the avoidance of doubt, the personal data processed in connection with the Trial is collected solely because it is technically necessary to deliver and manage the Trial license — it does not constitute commercial consideration for the Software. No marketing use, profiling, or commercial exploitation of Trial licensee data is carried out.

14. Governing Law and Jurisdiction#

14.1 B2B and professional use#

Where Licensee uses the Software exclusively in the course of a trade, business, or profession (i.e. as a non-consumer), this Agreement is governed by the laws of Spain and the parties irrevocably submit to the exclusive jurisdiction of the courts of Barcelona, Spain.

14.2 Consumer use (EU/EEA)#

Where Licensee is a consumer within the meaning of applicable EU law, this Agreement is governed by the laws of Spain. However, nothing in this Agreement deprives Licensee of the protection afforded by mandatory provisions of the law of the country in which Licensee habitually resides, nor of the right to bring proceedings in the courts of that country, pursuant to Arts. 17–19 of Regulation (EU) 1215/2012 (Brussels I bis).

14.3 Consumer use (outside EU/EEA)#

For consumers outside the EU/EEA, the mandatory consumer protection laws of the consumer’s country of habitual residence apply to the extent that they cannot be derogated by contract.

15. Online Dispute Resolution (EU)#

The European Commission provides an Online Dispute Resolution (ODR) platform for the out-of-court settlement of disputes between consumers and traders established in the EU:

ODR platform: https://ec.europa.eu/consumers/odr

Licensor’s email address for ODR purposes: support@lactuca.io

Licensor is not affiliated with any alternative dispute resolution (ADR) organism registered under Directive 2013/11/EU or the applicable national implementing legislation (in Spain: Real Decreto 231/2008 and Ley 7/2017). Licensor will endeavour to resolve complaints amicably before any formal proceedings are initiated.

16. License Compliance#

16.0 Scope of this section#

Concurrent-session and device-activation limits are enforced automatically and continuously by the technical mechanisms in §5 (hardware fingerprint) and §6.1 (concurrent session tracking). No audit of those limits is required or intended.

This section addresses the two types of misuse that cannot be detected technically: (i) use of the Software to serve users external to Licensee’s own organisation without an OEM Agreement; and (ii) use under an Academic & Community license for commercial purposes.

16.1 OEM and Academic misuse#

Licensee represents and warrants at all times during the term of this Agreement that:

(a) If Licensee holds a standard tier license (Individual, Team, or Enterprise), the Software is not being used as a calculation engine in any product or service made available to users external to Licensee’s own organisation, as defined in §1.

(b) If Licensee holds an Academic & Community license, the Software is not being used in any activity that generates revenue, directly or indirectly, as specified in §4.

Violation of either representation constitutes a material breach entitling Licensor to terminate the license immediately under §8. OEM violations are subject to termination without refund (§8.2(b)). To obtain an OEM license, contact support@lactuca.io with a description of the product, the estimated number of external end users, and the intended business model. OEM licenses are negotiated individually.

16.2 Remediation#

If Licensor has reasonable grounds to believe a violation of §16.1 is occurring, Licensor will notify Licensee in writing. Licensee shall:

(a) promptly purchase the appropriate tier or OEM Agreement to cover actual use, retroactively from the date the violation began; and

(b) pay any fees due for the excess period at the list price applicable at the time of notification, without prejudice to Licensor’s right to terminate under §8 in cases of deliberate misuse.

17. Contact#

For licensing inquiries, support, or legal notices:

Email: support@lactuca.io

Website: www.lactuca.io

A Spanish version of this Agreement (Contrato de Licencia de Usuario Final en español) is available at eula_es.

Language prevalence: for consumers habitually resident in Spain, the Spanish version shall prevail in the event of any discrepancy. For all other Licensees, the English version shall prevail.

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