The one-paragraph version
Aquatag is an iOS app that records when you water your plants. It does that entirely on your phone using SwiftData (Apple's local database), protected by iOS sandboxing. We do not operate a backend. We do not collect analytics. We do not know you installed the app.
What lives on your device
When you use Aquatag, the following is stored locally — in Apple's sandboxed app container, which only the app can read:
- Plant names, species, and the character you picked for each plant.
- Watering interval (how many days between waterings) for each plant.
- Every watering event, including the timestamp and — if enabled — the device name that logged it.
- A per-plant NFC tag identifier (the UID written to your physical sticker).
None of this data leaves the device unless you enable Home Assistant sync. Uninstalling the app removes it permanently.
Home Assistant sync (optional)
If you connect the app to your own Home Assistant instance, each watering event is sent as a single authenticated REST call to the URL you entered. That's it. No telemetry, no analytics, no fallback to our servers (we have none).
Your long-lived access token is stored in the iOS Keychain, which is hardware-backed and protected by Face ID / Touch ID. You can remove it from Settings → Home Assistant → Disconnect at any time.
App Store analytics
Apple provides install counts and crash reports to every App Store developer. This is aggregate and anonymized by Apple — we cannot see individual users. You can opt out at any time in iOS Settings → Privacy → Analytics & Improvements.
We do not use IDFA, SKAdNetwork, or any other attribution framework. The app is shipped with App Tracking Transparency disabled because there is nothing to track.
Children
Aquatag is safe for any age — including the kids this app was made for. It does not collect personal information from anyone, so there is nothing to gate behind an age prompt.
Changes to this policy
If we ever change how this app treats data, this page will be updated, and in-app users will see a one-time notice on first launch after the update. We will not retroactively apply a new policy to data collected under an older one.
Contact
Privacy questions, data requests, or general correspondence: privacy@aquatag.app. We are a two-person studio and read every email.