Terms of Use
1. Who these terms are with
This agreement is between you ("you", "the user") and DNADev ("we", "us"), the publisher of the Sailing Log Android application ("the App") and the website at sailinglogapp.com. By installing or using the App you agree to these terms. If you don't agree, don't use the App.
2. The App
Sailing Log is an offline-first logbook for sailors. It records trips, crew, GPS positions, photos, costs and damage reports on your device, and can export them as JSON or PDF. The App is provided as-is.
2.1 Not a navigation device
Sailing Log is a logbook, not a navigation system. The track map is informational only and is not certified for navigation. Do not rely on it for collision avoidance, route planning at sea, or any safety-critical decision. Use approved nautical charts and equipment.
3. Trial and lifetime unlock
- The App includes a 14-day free trial beginning the first time you launch it. During the trial all features are enabled.
- After the trial you can purchase a one-time lifetime unlock through Google Play (Android) or the App Store (iOS). The unlock removes the trial limit permanently and does not expire.
- The lifetime unlock is tied to the Google account used at the time of purchase. You can restore it on any device by signing into that Google account inside the App and tapping Restore previous purchase.
- If you choose not to purchase, the trial paywall remains in place but your locally-stored data is preserved. You can resume on day-15 by purchasing.
3.1 Payments and refunds
All payments are processed by Google Play Billing (Android) or the Apple App Store (iOS). We do not see your payment card details. Refunds within 48 hours of purchase are handled by Google directly (Play Store → Account → Order history). Outside that window, email [email protected] and we will assess case by case.
4. Your data
You own all data you enter into the App. We do not claim any rights over your trips, photos, log entries, or exports. The data is stored on your device and is your responsibility — make backups (Settings → Export JSON). See the Privacy Policy for what is and isn't sent to third parties.
5. Acceptable use
You agree not to:
- Reverse engineer, decompile or attempt to extract the App's source code, except where the law expressly permits it.
- Use the App to break the law, infringe anyone's rights, or harm any vessel, crew or property.
- Resell, redistribute or sublicense the App or the lifetime unlock.
- Submit your trial multiple times in an attempt to bypass the paywall.
6. Updates and changes
We may update the App and these terms. If we materially change the terms, we'll update the "Last updated" date and bump the in-app version. Continued use after a change means you accept the new terms. If the change is significant we will also surface a one-time notice inside the App.
7. Discontinuation
The lifetime unlock is offered for as long as the App is published on Google Play. If we permanently stop publishing the App we will:
- Announce it at least 90 days in advance on sailinglogapp.com;
- Ensure the App remains functional offline for everyone who already installed it (no kill-switch);
- Open-source the data-export tooling if there is any risk of users being unable to recover their JSON exports.
8. Warranty disclaimer
THE APP IS PROVIDED "AS IS" AND "AS AVAILABLE", WITHOUT WARRANTIES OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT. WE DO NOT WARRANT THAT THE APP WILL BE UNINTERRUPTED, ERROR-FREE, OR FREE OF VIRUSES OR OTHER HARMFUL COMPONENTS.
9. Limitation of liability
TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT WILL WE BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES, OR ANY LOSS OF PROFITS, DATA, BOAT, CARGO OR LIFE, WHETHER INCURRED DIRECTLY OR INDIRECTLY, ARISING OUT OF YOUR USE OF OR INABILITY TO USE THE APP. OUR TOTAL LIABILITY IS LIMITED TO THE AMOUNT YOU PAID FOR THE LIFETIME UNLOCK IN THE 12 MONTHS PRECEDING THE EVENT GIVING RISE TO THE CLAIM.
Nothing in these terms limits or excludes liability that cannot lawfully be limited or excluded — including liability for death or personal injury caused by negligence, or for fraud.
10. Governing law
These terms are governed by the laws of the European Union and of the Slovak Republic where they apply to you as a consumer. If you are a consumer in the EU, you keep the protections of mandatory consumer law in your country of residence. Any disputes that cannot be resolved informally will be brought before the competent courts of the Slovak Republic.
11. Contact
Questions about these terms? Write to [email protected]. All other questions go to [email protected].