Terms of Use

Last updated: September 20, 2026

Plain English: this is a free educational swimming site. Be 13 or older to make an account, do not abuse the AI, do not treat it as medical advice, and understand that it is provided as-is by one person, not a company.

1. Who this agreement is with

These terms are between you and Scarpline, the operator of Tidelyne (danielswims101@gmail.com). By using the site you agree to them. If you do not agree, please do not use the site.

2. Age

You must be at least 13 years old to create an account. If you are under 18, you should have a parent or guardian's permission to use the site and to follow anything on it. All content that does not require an account is open to everyone.

3. This is education, not coaching or medicine

Everything here is general information for learning about swimming. It is not medical, dietetic, or psychological advice, and it does not replace your coach, doctor, or physio. See the Medical & Training Disclaimer, which forms part of these terms.

4. Accounts

Give accurate information and keep your password to yourself.
You are responsible for what happens under your account.
Do not create accounts for other people or impersonate anyone.
We may suspend or delete accounts that break these terms.

5. Fair use of the AI features

AI requests cost real money to run, which is why they are limited to 5 messages per rolling 5 hours per account. Do not try to bypass that limit, script or automate requests, resell access, or use the AI to generate content unrelated to swimming. Do not submit other people's personal information.

6. AI output

AI-generated coaching, workouts, and technique analysis can be inaccurate. Check anything that matters with a qualified coach. You are responsible for deciding whether to act on it.

7. Your data

Your PRs and their course, training log, Race Planner goals and meets, fitted predictor profile and last split plan, and your timer and analytics settings are stored in your own browser. While you are signed in they are also saved to your account, so the same data is there on any device you sign in to; this is on by default and the Your Account panel on the My PRs page turns it off for a device. Only you can read that copy. Signed out, or with it switched off, the data is in your browser only, and clearing your browser data or switching devices will lose it unless you use the Export Backup feature on the My PRs page, which downloads all of it. An export is the only copy you control completely, and we are not responsible for data lost in either way.

8. Content and ownership

The text, code, calculators, and 3D visualizer on this site belong to the site owner. You may use them freely for your own training and coaching. Do not copy the site wholesale or redistribute it as your own product. Embedded videos belong to their respective creators and are shown through YouTube's privacy-enhanced embed player (youtube-nocookie.com); all rights remain with them. Third-party libraries remain under their own licenses.

9. No warranty

The site is provided "as is" and "as available", without warranties of any kind. It may be offline, incomplete, or wrong at any time. Meet dates, standards, and conversions change — always confirm anything that affects competition with usaswimming.org (opens in a new tab) or your governing body.

10. Limitation of liability

To the maximum extent permitted by law, the site owner is not liable for any indirect, incidental, or consequential damages, or for any injury, loss, or damage arising from your use of the site or reliance on its content.

11. Changes and ending use

These terms may change; the "Last updated" date above will be updated when they do. You can stop using the site at any time, and may ask for your account to be deleted by email.

12. Governing law

These terms are governed by the laws of New Jersey, USA, without regard to conflict of law rules.