Bubble Level: Angle & Slope

Check surface tilt, measure an edge angle, and keep a named record of your work. Bubble Level: Angle & Slope is a clear, offline level tool for everyday jobs such as aligning a shelf, checking a table, or positioning a picture frame.

TWO WAYS TO MEASURE
• Surface level: lay the phone flat to see combined tilt and separate X/Y angles.
• Long-edge angle meter: rest the phone on its long side to check horizontal, vertical, or a chosen angle. Targets include 0°, 15°, 30°, 45°, 60° and 90°.
• Choose degrees or percent slope. A stable-reading indicator helps you wait until the phone is still.

CALIBRATE, HOLD AND SAVE
Set a separate zero reference for each mode on a surface you know is level. Hold freezes the reading so you can move the phone and read it comfortably. Save up to 100 named measurements with their time, mode and calibration status.

A PRACTICAL MEASUREMENT LOG
Rename entries, review earlier angles, and export your log as a CSV file to a location you choose. You can also open Android's share sheet to send a CSV using your chosen app. Deleting a saved reading asks for confirmation.

MADE FOR QUIET, FOCUSED USE
No ads, subscriptions or account. The measuring features work offline. Choose your level tolerance, optional target tone, haptic feedback, and whether to keep the screen awake during live measurements. Sensor access stops when you hold a reading or leave the measuring screen.

ACCURACY AND DEVICE SUPPORT
Your phone needs an accelerometer. Measurement accuracy varies with the sensor, movement, case, contact edge and raised camera. Use a flat support if needed, calibrate only on a known level surface, and wait for a stable reading. Long-edge mode needs the phone standing on its long side. This digital spirit level is an everyday aid, not a certified construction or safety instrument.

Saved measurements stay on your device. The app has no Internet permission or analytics. Exported or shared files are handled by the storage location or receiving service you select.

Support: calebiker7@gmail.com