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Aquabook
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Privacy Policy

Last updated: November 9, 2026

Aquabook ("we", "our", "us") is an aquarium log for reef and freshwater tanks on iPhone, iPad and Apple Watch. This policy explains what data is processed when you use Aquabook and this website, by whom, and your choices.

1. Your tanks stay on your devices and in your iCloud

Everything you create in Aquabook – tanks, test results, doses and dosing products, maintenance tasks, inhabitants, equipment, expenses, ICP results, journal notes, photos and settings – is stored on your device. If iCloud is turned on, it is also synchronized through your private iCloud account using Apple's CloudKit (your private database), so it appears on your other devices. Data in your iCloud account is handled by Apple under the Apple Privacy Policy; we cannot see it.

Aquabook has no user accounts, and we do not run any server that stores or receives your data.

The Apple Watch app exchanges your latest values, tasks and the entries you make on the Watch directly with your iPhone using Apple's WatchConnectivity. Widgets read a summary that the app saves in storage that only Aquabook and its extensions on the same device can access.

Photos are only read when you take or choose them. Aquabook does not access the rest of your photo library.

If you use Aquabook Pro to read the value from a test meter's display with the camera, the text is recognized on your device with Apple's Vision framework. The photo is not saved and never leaves your device.

2. Sharing a tank

If you share a tank (Aquabook Pro), the tank and everything in it stay in your iCloud account, and Apple's CloudKit makes them available to the people you invite. Depending on the permission you choose for each person, they can see, or see and change, the tank's tests, doses, tasks, inhabitants, journal and photos. Invitations, and the names or Apple Account details of participants shown in the share, are handled by Apple.

If someone shares a tank with you, it lives in their iCloud account, and they and the other participants can see what you add to it. The owner can stop sharing and a participant can leave at any time. None of this passes through us.

3. Import, export and reports

When you import a CSV file or restore an Aquabook export, Aquabook reads only the file you choose, on your device. When you export your data (JSON or CSV) or create a PDF report, Aquabook creates the file on your device and opens the share sheet. Where the file goes is your choice; nothing is sent to us.

4. Purchases (Apple and RevenueCat)

The one-time Aquabook Pro purchase is processed by Apple through the App Store. We never receive your payment details.

We use RevenueCat to verify purchases and to restore them on your devices. RevenueCat receives the purchase transaction (receipt) from Apple together with a random, anonymous app user ID created by the app. It does not receive your name, contact details or anything from your tanks. If you downloaded Aquabook from an Apple Search Ads campaign, Apple's privacy-preserving attribution token is shared with RevenueCat so we can see which search terms lead to purchases; this does not identify you. See the RevenueCat Privacy Policy.

5. Anonymous usage statistics (TelemetryDeck)

To understand how Aquabook is used and to improve it, the app sends anonymous usage events to TelemetryDeck, for example that a test was logged and roughly how many values it had, that a dose or a maintenance task was logged, which type of tank was created, which features are used, and whether the purchase screen was viewed. These events never contain tank names, notes, species, names of inhabitants, measured values, photos or anything else you type. TelemetryDeck uses a hashed, anonymous identifier and does not track you across apps. See the TelemetryDeck Privacy Policy.

You can turn this off at any time in Aquabook's Settings. When it is off, the statistics service is not started at all.

6. Notifications, Siri and Shortcuts

If you turn on reminders, Aquabook schedules local notifications on your device. Nothing is sent to us.

If you use Siri or the Shortcuts app to log a value or a dose or to complete a task, your request is processed by Apple under the Apple Privacy Policy. Aquabook only receives the entry needed to save it on your device; nothing is sent to us.

7. No advertising and no tracking

Aquabook shows no ads, contains no advertising or tracking SDKs and does not track you across apps or websites.

8. This website and the support form

This website does not use analytics or advertising cookies. It sets one cookie that remembers the language you choose. The typeface is loaded from Google Fonts, and the support form's input checks from jsDelivr, so your browser sends your IP address to those services when it fetches the files.

When you send a message through the support form, your name, email address, message and the page language are sent by email to us using the email service Lettermint. We use them only to answer you, and we delete the email when it is no longer needed. You can also email us directly instead.

9. Children

Aquabook is not directed at children under 13, and we do not knowingly collect personal data from children.

10. Your choices and rights

  • Turn off anonymous statistics in Settings.
  • Turn off iCloud for Aquabook in the Settings app on your device to keep your tanks on that device only.
  • Stop sharing a tank, or leave a tank someone shared with you, from the tank in Aquabook.
  • Delete all Aquabook data by deleting the app from your devices; data in your iCloud account can be deleted in your device's iCloud settings.

Depending on where you live, you may have the right to access, correct or delete personal data held by us or by the services above. Contact us and we will help.

11. Contact

Questions about this policy: juhlin.henrik@gmail.com or the support page.

12. Changes

We may update this policy. The date at the top shows the latest version.