Tankline: privacy

Last updated 7 October 2026

Tankline reads Bluetooth gas-bottle level sensors and estimates how much gas is left. It is a small Android app I build on my own (com.growingpeas.propane on Google Play). This page says what it keeps, what leaves your phone, and why it asks for each permission. The controller is Lawrenza SRL, trading as Growing Peas; full details are on the legal notice.

What leaves your phone

• Nothing, unless you export it. There is no server to send it to.
• Purchases. The Pro upgrade is a one-time purchase handled by Google Play. Google processes the payment under its own privacy policy; I receive no card details, only the order record Google shares with every developer (order number, product, price and country).

There is no account, no sign-in, no analytics, no advertising, no crash reporting and no server of mine. The app contains no third-party tracking code.

What stays on your phone

• Your sensors, their readings, the bottle you chose and your alarm thresholds.
• CSV exports (Pro), written where you choose.

Android backup is on. If you have backup enabled on your phone, Android copies the app's data to your own Google account, as it does for most apps, and restores it on a new phone. That copy is held by Google for you; I have no access to it. You can turn it off in Settings, System, Backup.

Permissions

• Nearby devices (Bluetooth): to listen to sensor broadcasts; declared as never used to find your location.
• Notifications and foreground service: for low-level alarms with the screen off (Pro); stop it from the notification.
• Internet: used only by Google Play for the purchase.

The app never asks for your location, your contacts or your files.

Limits of use

Tankline does not detect gas leaks. The level is an estimate from the sensor reading and the bottle you choose. Follow your gas supplier's safety instructions, and install a gas detector where one is required.

Deleting your data

Everything is on your phone, so you delete it there: in the app, or with Settings, Apps, Tankline, Storage, Clear storage, or by uninstalling. I hold no copy to delete. Files you exported or shared stay where you put them.

Children

The app is not directed at children under 13.

Changes and questions

If this page changes, the date at the top changes with it. Write to [email protected] about anything here.