Terms of Use (EULA)
Last updated: 2026-07-13 · Version 1
Please read this Agreement before using NaturalTime (“the App”).
1. License
We grant you a personal, non-exclusive, non-transferable, revocable license to use the App on devices you own or control, for personal, non-commercial use.
2. Not for safety-critical use
Tide, sun and moon times are ESTIMATES produced by mathematical models and third-party data. They may be inaccurate. Do NOT rely on the App for navigation, diving, or any activity where an error could cause harm. Always use official sources and your own judgement.
3. Subscriptions & purchases
Premium is an auto-renewing yearly subscription (US$4.99 / year) that unlocks unlimited locations (the Free plan is limited to 30 distinct geopositions per calendar month), unlimited alarms (up to 120), removes the one-active-alarm limit so every alarm can be ON at once, and enables custom ringtones. The Free plan allows up to 3 alarms with a single alarm ON at a time. The subscription renews automatically each year unless cancelled at least 24 hours before the period ends. Payment is processed by the app store — Google Play Billing or the Apple App Store — and is subject to that store's terms. Manage or cancel it in Google Play > Subscriptions or Apple > Subscriptions. Restore re-activates Premium on a new install of the same store account. A single subscription may be used on a limited number of devices; excess devices are declined.
4. Intellectual property & anti-copying
The App — including its source and object code, design, user interface, layout, graphics, app icon, name, “look and feel” and all related content — is owned by us or our licensors and is protected by copyright, trademark and other laws. Except for the limited license in section 1, no rights are granted to you. You may NOT copy, reproduce, republish, distribute, sell, sub-license or rent the App; create derivative works from it; decompile, disassemble or reverse engineer it (except where this restriction is prohibited by law); remove or alter any proprietary notices; or clone or reproduce the App or any substantial part of it, whether to publish a competing or similar product or otherwise. Open datasets (NOAA, TICON, FES2022) and open-source components remain under their respective licenses and attributions.
5. Acceptable use
You agree not to resell or commercially exploit the App; misuse, overload, probe or attack our servers or security (including the request-signing and device attestation mechanisms); access the service by automated or unauthorized means; or use the App in violation of any applicable law.
6. Disclaimer of warranty
The App is provided “as is”, without warranties of any kind, to the maximum extent permitted by law.
7. Limitation of liability
To the maximum extent permitted by law, we are not liable for any indirect, incidental or consequential damages arising from your use of the App.
8. Changes, pricing & termination
We may, at our sole discretion, modify, add or remove features of the App and set or change the price and terms of any future purchases or subscriptions. Price changes do not affect a subscription period you have already paid for. For existing subscribers, any change to the recurring price is applied only through the app store's price-change process and with the notice (and, where required, the consent) it mandates. We may also update these terms; your continued use of the App after a change takes effect means you accept it. We may suspend or terminate your access for violations of these terms.
9. Fraud, chargebacks & anti-abuse
Premium is granted only for a genuinely completed, non-reversed payment. If a payment is refunded, charged back, disputed, reversed, obtained by fraud or prohibited means, or if we reasonably suspect abuse (including sharing one subscription across more devices than permitted, evading limits, or tampering with the app or our security), we may immediately and without notice revoke Premium, downgrade the account to Free (which turns off all but one active alarm), decline service, and/or terminate access. Free-tier limits then apply.
10. Indemnification
To the maximum extent permitted by law, you agree to indemnify and hold us harmless from any claims, damages, liabilities and expenses arising out of your misuse of the App or your violation of these terms or any law or third-party right.
11. Governing law
These terms are governed by the laws of Portugal, without regard to conflict-of-law rules, except where mandatory local consumer-protection law grants you additional rights that cannot be waived.
12. Dispute resolution & class-action waiver
Where permitted by law, any dispute will be resolved on an individual basis, and you and we waive any right to bring or participate in a class, collective or representative action. Nothing in these terms removes any non-waivable right you have under the mandatory law of your country of residence.
13. Severability & entire agreement
If any provision is held unenforceable, the rest remains in effect. Together with the Privacy Policy, this Agreement is the entire agreement between you and us regarding the App and supersedes prior understandings.
14. Acceptance
You must review and accept these Terms and the Privacy Policy before using the App; acceptance (version and time) is recorded on your device. If you do not agree, do not use the App.