Bubble Level 1.0

First public release of Bubble Level for Android 6.0 and later.

Lay the phone flat for a bullseye level, or stand it on an edge for a tube level. It picks the mode itself and keeps the tube level with the world whichever way up you hold it.

You can calibrate on any firm surface. Take a reading, turn the phone around and take a second one; the two cancel the slope of the surface and leave only the sensor's own error. Flat and edge readings are calibrated separately.

Also in this version: degrees, percent, mm/m and in/ft; a level tolerance from ±0.1° to ±1° with a short vibration when you reach it; a hold button; six colour themes plus a wallpaper theme on Android 12 and later; TalkBack and Switch Access support.

The app has no ads or analytics and no internet permission.

Files

• Level-1.0.apk: install this on your phone.
• Level-1.0.aab: the Google Play bundle.
• mapping-1.0.txt: R8 mapping for reading crash stack traces.

The Play Store version will be signed with Google's key, and Android won't update across different signing keys. If you move between this APK and the Play version later, uninstall first. That also deletes your calibration and settings.