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Terms of Use

The agreement between you and LRM Labs for the LRM Labs apps and this website.

Last updated October 11, 2026

01Acceptance and eligibility

These Terms of Use ("Terms") are a binding agreement between you and LRM Labs ("LRM Labs", "we", "us", "our"). They govern your use of our mobile applications — currently Ntervals and Fastn, together with any future LRM Labs apps — and of this website (together, the "Services").

By downloading, installing or using any of the Services, you confirm that you have read and accept these Terms and our Privacy Policy. If you do not agree, do not use the Services.

You must be at least 13 years old, or the minimum age of digital consent where you live, to use the Services, and you represent that you meet that requirement. Some apps set a higher age requirement, stated below. If you use the Services on behalf of an organisation, you confirm you are authorised to bind it to these Terms.

02The apps these Terms cover

These Terms apply to every LRM Labs app. Where an app genuinely differs, the difference is set out in its own subsection so unrelated rules are not forced onto an app that does not need them.

Ntervals

An interval-workout timer (HIIT, Tabata, circuits, boxing rounds, EMOM). It stores your workouts and history on your device and has no account. The general fitness caution in the disclaimer section applies to Ntervals.

Fastn

An intermittent-fasting tracker. Because it concerns eating patterns, the health disclaimer includes fasting-specific and medical provisions, and you must be at least 18 years old to use it.

Future apps

When LRM Labs releases a new app, these Terms apply to it on the same basis, with any app-specific provisions added here or presented in the app.

03Licence to use the apps

Subject to these Terms, we grant you a personal, limited, non-exclusive, non-transferable and revocable licence to install and use the apps on devices you own or control, for your own non-commercial use, in accordance with the rules of the store you obtained the app from.

This licence does not allow you to:

  • copy, modify, distribute, sell, rent, lease or create derivative works of any part of the Services;
  • reverse engineer, decompile or attempt to extract the source code of an app, except where this restriction is prohibited by applicable law;
  • remove, alter or obscure any proprietary notice, or translate the app into another language, without our permission;
  • circumvent, disable or interfere with security-related features, or features that restrict use or copying of content;
  • use the Services for any commercial purpose, or to build or assist a competing product;
  • use the Services unlawfully or in a way that infringes the rights of others.

The apps are licensed, not sold, to you. We and our licensors keep all rights not expressly granted.

04Your device and connection

You are responsible for your device, for keeping your operating system and the app up to date, and for any backups you choose to make. Because the apps store your data on your device, uninstalling an app or resetting your device will delete that app’s data. Each app provides an export so you can keep your own copy.

Some functions need an internet connection; we are not responsible if the Services do not work at full capacity because of connectivity or data limits. Your mobile carrier’s charges (including roaming) may apply, and if you are not the account holder you confirm you have their permission. Keep your device secure; we advise against jailbreaking or rooting it, which can compromise the app’s security and function.

05Acceptable use

You agree not to use the Services to:

  • break any law or regulation, or infringe anyone’s rights;
  • interfere with or disrupt the integrity or performance of the Services, or gain unauthorised access to any system behind them;
  • falsify or manipulate any data the Services process (for example subscription state or activity history) for a fraudulent or deceptive purpose;
  • use any robot, scraper or other automated means to access the Services, except as any published interface expressly allows.

06Health, fitness and medical disclaimer

All apps — general

The Services provide general information and tools for wellness purposes only. They are not medical advice, diagnosis or treatment, and are not a substitute for the judgement of a qualified healthcare professional. Never disregard professional advice, or delay seeking it, because of something in an app. By using the Services you accept responsibility for your own health and decisions.

Ntervals — physical activity

High-intensity interval training carries inherent risks. Consult a physician before beginning a new exercise programme, particularly if you have a heart condition, are pregnant, or have any injury or medical condition. Stop and seek help if you feel pain, dizziness or shortness of breath. You use Ntervals and perform any workout entirely at your own risk.

Fastn — intermittent fasting

Intermittent fasting is not appropriate for everyone. Do not use Fastn, and speak to a healthcare professional first, if you are pregnant or breastfeeding, under 18, have or have had an eating disorder or disordered eating, have diabetes or another condition affecting blood sugar, take medication that must be taken with food, or have any other chronic medical condition for which fasting may be contraindicated. The fasting "zones", timelines and nutrition content in Fastn are general educational summaries, not personalised guidance. Stop fasting and seek advice if you feel unwell. You assume full responsibility for any outcome of your fasting practices.

07Subscriptions, purchases and free trials

Some features are free and others require a paid subscription or a one-time purchase, as described in the app. Prices are shown in the app before you buy.

Billing is handled by Apple or Google

All payments are processed by the App Store or Google Play, not by LRM Labs. Your purchase is charged to your Apple or Google account. We use RevenueCat, a subscription-management service, to record and verify entitlements; we never receive your full payment card details.

Auto-renewal and cancellation

  • A subscription renews automatically for the same period (for example monthly or yearly) unless you cancel at least 24 hours before the current period ends.
  • Your account is charged for renewal within 24 hours before the period ends, at the price shown at purchase unless we have given notice of a change.
  • Cancel in your App Store or Google Play account settings — not by deleting the app. Cancellation takes effect at the end of the current period, and you keep paid access until then.

Free trials

  • If a subscription includes a free trial, it begins when you subscribe and runs for the stated period. Cancel any time during the trial to avoid a charge; if you do not, you are charged for the first paid period automatically.
  • Trials are for new subscribers. If you have already used a trial of a subscription in the app, you may not be eligible for another.
  • Any unused portion of a trial is forfeited when you buy a subscription that includes it.

Price changes

We may change subscription prices. A change does not apply retroactively to your current period; the store will notify you and seek your consent where its rules require, and continued use after a change takes effect is acceptance of the new price.

Refunds

Because Apple and Google are the sellers, refund requests are handled by them:

  • Apple: request a refund at reportaproblem.apple.com.
  • Google Play: request a refund through the Play Store order history or Google support.
  • We can help point you to the right process, but we cannot issue store refunds ourselves.

Consumers in the EU and UK may have a statutory right of withdrawal. Because paid features are made available immediately, you may be treated as having asked us to begin performance and, to the extent the law allows, waived that right; Apple and Google apply these rights through their own refund processes. Nothing here limits any non-waivable right you have under the consumer law that applies to you.

08Purchases and use through Apple and Google

The following applies to the extent you obtained an app from the Apple App Store or Google Play.

Apple App Store

  • These Terms are between you and LRM Labs only, not with Apple. Apple is not responsible for the app or its content.
  • The licence is limited to use on Apple-branded devices you own or control, and as the Usage Rules in the Apple Media Services Terms and Conditions permit.
  • Apple has no obligation to provide any maintenance or support for the app.
  • If the app fails to conform to any applicable warranty, you may notify Apple and Apple will refund the purchase price (if any); to the maximum extent permitted by law, Apple has no other warranty obligation for the app.
  • LRM Labs, not Apple, is responsible for addressing any claim by you or a third party relating to the app, including product-liability claims, claims that the app fails to meet a legal or regulatory requirement, claims under consumer-protection or similar law, and intellectual-property claims.
  • Apple and its subsidiaries are third-party beneficiaries of these Terms and may enforce them against you.
  • You represent that you are not located in a country subject to a U.S. Government embargo or designated as "terrorist supporting", and are not on any U.S. Government prohibited-parties list.

Google Play

  • Google is not responsible for providing the app or any support for it.
  • Google is not responsible for addressing any claim relating to the app or your use of it.
  • Your use of the app must comply with the Google Play Terms of Service then in effect.

09Intellectual property and feedback

The Services, including their software, design, text, graphics, and the names and logos "LRM Labs", "Ntervals" and "Fastn", are owned by LRM Labs or its licensors and are protected by intellectual-property laws. These Terms transfer none of those rights to you, and you may not use our trademarks without our prior written permission.

If you send us ideas, suggestions or other feedback about the Services, you grant us a non-exclusive, worldwide, royalty-free, perpetual, irrevocable licence to use, modify and incorporate it into any product or service, with no obligation of compensation, attribution or confidentiality, and you waive any moral rights in it to the extent permitted by law.

10Third-party services

The Services rely on a small number of third parties, currently: Apple and Google (app distribution and payments) and RevenueCat (subscription management). Your use of those services is also governed by their own terms and privacy policies. We are not responsible for third-party services.

11Availability, updates and changes to the Services

We may update the apps from time to time, including changes to features, functionality or system requirements, and you may need to install an update to keep using an app. We do not guarantee that an app will always be compatible with your device’s operating-system version, and we may add, change, remove, suspend or discontinue features or an entire app at any time. If we discontinue a paid app or feature, we will act reasonably and in line with store rules and consumer law regarding any prepaid amounts. Except as required by law, we are not liable for any modification, suspension or discontinuation of the Services.

12Disclaimer of warranties

To the fullest extent permitted by law, the Services are provided "as is" and "as available", without warranties of any kind, whether express, implied or statutory, including implied warranties of merchantability, fitness for a particular purpose, quality, non-infringement, and accuracy.

We do not warrant that:

  • the Services will meet your requirements or expectations;
  • the Services will be uninterrupted, timely, secure or error-free;
  • timing, cues, calculations or content will be accurate, reliable or complete;
  • any defect will be corrected.

Some jurisdictions do not allow the exclusion of certain warranties. In that case the exclusions above apply only to the extent permitted, and you may have warranty rights that cannot be excluded.

13Limitation of liability

To the fullest extent permitted by law, LRM Labs and its contractors and suppliers will not be liable for any indirect, incidental, special, consequential or punitive damages, or for any loss of data, profits, revenue, goodwill or other intangible loss, arising out of or relating to the Services — including any health-related outcome or any decision made in reliance on an app — even if advised of the possibility of such damages.

To the fullest extent permitted by law, our total cumulative liability for all claims relating to the Services is limited to the greater of the amount you paid us for the relevant app in the 12 months before the event giving rise to the claim, or USD $50. This limit applies whether the claim is based on contract, tort, negligence, strict liability or any other theory.

Nothing in these Terms excludes or limits liability for fraud, for death or personal injury caused by negligence, or for any liability that cannot be excluded under applicable law.

14Indemnification

You agree to indemnify, defend and hold LRM Labs and its contractors harmless from any claims, liabilities, damages, losses and expenses (including reasonable legal fees) arising out of or connected with your use of the Services, your breach of these Terms, your violation of any third-party right, or any health-related outcome of your own activity — except to the extent the claim results from our own act or omission.

15Term and termination

These Terms apply while you use the Services. You may end them at any time by stopping use, deleting the apps, and cancelling any active subscription through your store account. We may suspend or end your licence if you materially breach these Terms or if required by law or store rules. On termination the licence ends and you must stop using the apps; sections that by their nature should survive (licence restrictions, IP, disclaimers, liability limits, indemnity, governing law, and this sentence) survive.

16Governing law and disputes

We would rather resolve concerns directly. Before starting any formal proceeding, please contact us and give us a reasonable chance to resolve the matter.

These Terms are governed by the law applicable at LRM Labs’ principal place of business, without regard to conflict-of-laws rules, and the courts there have jurisdiction. If you are a consumer, this does not deprive you of the protection of mandatory consumer-protection rules of the place where you live, and you may bring proceedings in your local courts where the law gives you that right.

17Changes to these Terms

We may update these Terms as the apps and the law evolve. If a change is material, we will give reasonable notice — for example, in the app or on this page — and update the date below. Continuing to use the Services after a change takes effect means you accept the updated Terms; if you do not accept them, stop using the Services.

18General

Entire agreement. These Terms and the Privacy Policy are the entire agreement between you and LRM Labs about the Services and replace any earlier agreement on the same subject.

Severability. If any provision is found unenforceable, it will be applied as far as possible and the rest of the Terms stay in effect.

No waiver. If we do not enforce a provision, that is not a waiver of our right to enforce it later.

Assignment. You may not assign these Terms without our written consent. We may assign them, for example in connection with a merger, acquisition or sale of assets.

Force majeure. We are not liable for any delay or failure caused by events beyond our reasonable control.

Notices. We may give notice through the app, this website, or the email address you use to contact us.

Intellectual-property complaints. If you believe content in the Services infringes your rights, contact support@lrmlabs.app with enough detail to identify the material and your claim.

19Contact

Questions about these Terms: support@lrmlabs.app.