Terms of service
Last updated October 9, 2026
These terms are an agreement between you and David Pastor, an individual based in Costa Rica (“we”), for your use of TRN/LOG at trnlog.app, including its apps, emails and connectors (the “service”). By creating an account or using the service, you agree to them. If you do not agree, do not use the service.
Not medical advice
TRN/LOG suggests training volumes and targets from what you log. It is a training tool, not medical, health or physiotherapy advice, and it does not know your full health history. Talk to a doctor before starting or changing an exercise program, especially if you have an injury, a medical condition, or are pregnant. Strength training carries a risk of injury. Use proper technique, a spotter or safety equipment where appropriate, and choose weights you can lift safely. Stop if something hurts. You are responsible for what you lift.
Who can use it
- You must be at least 16 years old.
- Use an email address that is yours: you confirm it before the account opens.
- Keep your password private. You are responsible for activity on your account; tell us promptly if you think someone else has access.
Your data
Your training data is yours. You give us permission to store, process and display it only to provide and improve the service, as described in our privacy policy. You can export your logged sets from the app and delete your account, with all its data, in Settings.
Acceptable use
You agree not to:
- break the law, or use the service to harm or harass anyone;
- access another person’s account or data, or try to get around security or rate limits;
- overload, scrape or reverse-engineer the service, except where the law allows it;
- use the service to build a competing product from our content or code.
AI features
Some optional features use AI, for example transcribing a set you say out loud, suggesting a swap, or explaining your week. AI output can be wrong; check it before relying on it. AI never sets your weights, sets or reps; those come from the app’s rules.
Connected assistants
If you connect an assistant such as ChatGPT or Claude, you authorize it to read the training data shown on the consent screen. That assistant is provided by a third party under its own terms, and we are not responsible for what it says or does with the information. You can disconnect it at any time in Settings → Account and data → Connected assistants.
Exercise content
Exercise names, instructions and photos come from the free-exercise-db project, which is published as public domain. Everything else in TRN/LOG, including its design, logo and software, belongs to us.
Subscription and payment
TRN/LOG is a paid subscription: USD 12 a month or USD 90 a year, plus any taxes that apply where you live. Until we start charging, the service is free, and we will tell you in the app or by email before that changes.
- Free trial. New accounts get 14 days free, without a card. When the trial ends, the app asks you to subscribe; your data stays, and you can still export it or delete your account.
- Who you pay. Payments are handled by Polar (polar.sh), which sells the subscription to you as merchant of record: it charges you, handles taxes and invoices, and its own terms apply to the purchase. We never see your full card details.
- Renewal. Your subscription renews automatically each month or year at the price then in effect until you cancel. We will tell you before a price change applies to you.
- Cancelling. Cancel at any time in Settings → Account and data → Manage billing. You keep access until the end of the period you paid for, and you will not be charged again.
- Refunds. We do not refund unused parts of a period, except where the law requires it. If you were charged by mistake, write to hello@trnlog.app within 14 days and we will put it right.
- What it includes. The whole app, including the AI features and connected assistants. If a subscription lapses, those stop until you subscribe again.
Changes to the service
We may add, change or remove features, and we may suspend or end the service; if we end it, we will give reasonable notice where we can so you can export your data, and refund the unused part of any paid period.
Ending your use
You can stop using the service and ask us to delete your account at any time. We may suspend or close an account that breaks these terms or puts the service or other people at risk, and we will tell you why unless the law prevents it.
Disclaimers
The service is provided “as is” and “as available”. To the extent the law allows, we make no warranties of any kind, including that it will be uninterrupted, error-free, or that its suggestions will suit you. Nothing in these terms limits rights you have as a consumer that cannot be limited by law.
Limitation of liability
To the extent the law allows, we are not liable for indirect or consequential losses, or for injury resulting from exercise you choose to do, and our total liability for any claim relating to the service is limited to the greater of USD 50 and what you paid us in the 12 months before the claim. We do not exclude liability that cannot be excluded by law, such as for death or personal injury caused by our negligence or for fraud.
Governing law
These terms are governed by the laws of Costa Rica, and disputes will be handled by the courts of Costa Rica, unless the law where you live gives you the right to bring a claim there.
Changes to these terms
We may update these terms. We will change the date above and, for significant changes, tell you in the app or by email before they take effect. If you keep using the service after that, the new terms apply.
Contact
David Pastor, Costa Rica. Support: hello@trnlog.app. Privacy requests: privacy@trnlog.app.