Last updated: 23 July 2026
ReefTracker is an offline reef-aquarium tracking app for Android and iOS. This page covers how to get help, report a problem, or ask a question.
New to the app, or wondering what a feature does? The illustrated ReefTracker User Guide walks through every screen – from your first aquarium to dosing calculators, ICP imports and backups.
For questions, bug reports, or feature requests, email bobrovsky@seznam.cz. Please include your device model, OS version, and app version (found in Settings → About), and steps to reproduce if you're reporting a bug.
No account or sign-up is required. All your tanks, readings, and settings are stored locally on your device only. See the privacy policy for details.
The core of the app is free to use with up to two aquariums. ReefTracker Pro adds unlimited tanks and the power features marked PRO in the feature overview – dosing calculators, smart insights, ICP and Hanna imports, Google Drive backup and more. If you installed the app before the Pro tier existed, every feature that existed at that point stays free for you forever.
Use Settings → Backup to export a backup file (via the share sheet) and import it again on the same or a new device. On Android, the same section also offers optional Google Drive backup.
Not yet – Google Drive backup is currently Android-only. On iOS, use the manual export/import backup described above to move data between devices.
The microelements import supports Fauna Marin and ATI (ZIMS) ICP report files. If a report imports incorrectly, email a copy of the report file along with which lab produced it, and we'll look into adding or fixing support for that format.
The Hanna checker connection and the checker display scan are experimental features: switch them on in Settings → Experimental first. They are described in the user guide's importing section.
Check that notifications are allowed for ReefTracker in your device's system settings, and that the specific reminder (testing, dosing, or maintenance) is enabled for the relevant tank. Some manufacturers' battery-optimization settings can also delay or suppress scheduled notifications – allowing ReefTracker to run unrestricted in the background usually fixes this.
You can delete individual tanks, readings, or other entries directly in the app. Uninstalling the app removes all of its local data from your device. See the privacy policy for details.
See the privacy policy for details on how ReefTracker handles your data – in short, the app is fully offline and your data never leaves your device unless you export or back it up yourself.