Tree Height Meter — Privacy Policy
Last updated: 2026-11-08
This app is built to respect your privacy. We do not sell your personal data. Photos you take in the app are processed on your device and are never uploaded by the app. This policy explains what the app uses, where it is kept, and how to remove it.
WHAT THE APP USES
- Motion sensors (accelerometer): to measure the angle used to compute tree height, and to check that the phone is level when you measure a person's height.
- Camera: only when you start a person measurement in the Person tab and allow camera access. The app takes one photo of the person next to a sheet of paper on the wall. The height is computed on your device from points you tap on that photo. The app does not request location permission or use GPS. It does not use the microphone.
- Information you enter: tree distances, names you type for people, and heights you type into the height comparison.
- Usage analytics and crash diagnostics (Google Firebase Analytics and Crashlytics): which screens and features are used (for example, that a person measurement was finished and its estimated error), app version, device model and operating system, and an app-instance identifier set by Firebase. These events never include the photo, a measured or typed height, or a typed name.
- Advertising (Google AdMob): the ads SDK automatically collects an advertising identifier, your IP address (which can indicate your approximate location), ad interactions, device information and diagnostics to show and measure ads and prevent fraud. See ADVERTISING below.
WHERE IT IS KEPT AND HOW TO REMOVE IT
- Measurements (height, estimated error, measurement options, date and the name you chose), the height comparison list, recently used names and your settings are stored in the app's storage on your device. We do not run servers that receive them.
- Deleting a measurement removes it and its entry in the height comparison. People you typed into the comparison are removed with their own delete button. Recently used names and settings stay until you uninstall the app or clear the app's data in your device settings.
- The photo is used during the current measurement (marking the points, the result screen and re-marking) and is not included in saved measurements. Taking the photo writes a temporary file in the app's cache. The app does not delete this file itself; it can remain until the operating system clears the cache, you clear the app's data, or you uninstall the app.
- On Android, if you have device backup turned on, Android may include the app's stored data in your Google backup under your backup settings. On iOS, the app's data may be included in your iCloud or device backup under your backup settings. Uninstalling the app or clearing its data does not erase copies already in a backup, or text you already shared with someone.
- Firebase and AdMob keep the analytics, diagnostics and advertising data they receive under their own retention rules (see the links below). Deleting data in the app does not delete data those services already received.
SHARING
- We do not sell or rent your data. Apart from sharing you start yourself, the app shares data only with the services listed below.
- If you tap Share in the height comparison, the app creates a text with the names and heights in your list and hands it to the app you choose. No comparison text is shared unless you do this.
YOUR CHOICES
- You can turn camera access off at any time in your device settings; the rest of the app keeps working, and the Person tab offers a sample photo.
- You can limit ad tracking (see below) and clear or delete the app's data at any time.
SECURITY
- Your measurements stay in the app's private storage on your device. Data sent to Firebase and AdMob is sent over encrypted connections (HTTPS) and is handled under those providers' privacy terms linked below, which protect it at least as well as this policy describes.
ADVERTISING
Google AdMob uses the data listed above, including an advertising identifier, to deliver and measure ads. You can limit or reset the identifier in your device settings. On iOS the app asks for tracking permission (App Tracking Transparency); declining keeps the app fully usable with non-personalized ads. In the EEA/UK the app uses Google's consent form (UMP) to honor your choices, and you can change them later from the app menu.
THIRD-PARTY SERVICES
- Google Firebase (Analytics, Crashlytics): https://firebase.google.com/support/privacy
- Google AdMob (ads): https://policies.google.com/technologies/ads
CHILDREN
This app is not directed to children under 13 and we do not knowingly collect personal information from children. Parents or guardians may use the Person tab to measure a child's height at home. The child's photo, name and height are then handled on the parent's device as described above (including the temporary photo file, device backups if turned on, and any comparison text the parent chooses to share) and are not sent to us. The app makes no medical or growth assessment.
CHANGES TO THIS POLICY
We may update this policy from time to time. Changes will be reflected by the "Last updated" date above.
CONTACT
If you have questions about this policy, contact us through the developer contact on the app's store page.