Bubble Level: Tilt & Angle

Level turns your phone into a bubble level and an angle finder (clinometer). It is made for when one hand is busy and the phone is resting on the surface: put it down, read the slope and carry on.

No ads, no account, no connection and no permissions to accept.

Measure in the unit you need:

• Degrees, with one decimal.

• Percent slope (%), for ramps, drains and gutters.

• Millimeters per meter (mm/m), for leveling against a building reference.

• Inches per foot (in/ft), with two decimals.

Switch units with one tap, choose which ones to show in Settings; the app remembers your choice.

Three modes, chosen automatically:

• Flat: a 360° bubble for tables, countertops, washing machines or the floor.

• Horizontal and Vertical: a tube along the measured axis, for shelves, picture frames and walls.

The name of the mode is always shown as text on screen.

Set a target and save it:

• Set a target angle and the phone guides you with vibration or beeps, closer together as you approach, until you reach it.

• Save measurements with a name, set one as your target with a tap, and reorder or delete them.

Calibrate your phone in two steps:

• Corrects the sensor error of each resting side, without needing a level surface.

• Rest the phone against a stop and turn it half a turn on the table: a beep and a vibration tell you when, without looking at the screen.

• You can remove the calibration of a side and undo it.

• The app shows "Not calibrated" when the side it is resting on hasn't been calibrated.

Hold the reading and step back:

• One button holds the reading; "Hold when steady" does it by itself once the phone stops moving, with a beep and a vibration.

• While held, the bubble (or tube) turns gray, so it is not mistaken for a live reading.

Level without looking at the screen:

• When it gets level, the phone vibrates with two short pulses, and can beep if you turn that on; both are set in Settings.

• Choose the level margin: 0.2° for long shelves, 0.5° for general use or 1° for outdoors.

Designed to be accessible:

• Designed for TalkBack: it tells you the slope with its value and its unit and, while you measure, which side is lower; every button and switch has a name.

• Vibration and beeps to calibrate, hold the reading and level without looking at the screen.

• Status in words, not just color: "Measuring…", "Stabilizing…", "Almost level" and "Level".

• Follows your phone's text size, even very large text, with good contrast in light and dark theme.

A tutorial the first time you open it:

• Five short steps on top of the level, which keeps measuring. Replay it any time from Settings.

Built to read at a glance:

• Large digits.

• The screen stays on while you measure.

• A button to rotate the screen with your phone even if system rotation is locked.

Private by design:

• No ads.

• No account or sign-up.

• It does not even ask for Internet access: the app sends nothing anywhere.

• Your settings, calibration and saved measurements stay on your phone, and you can delete them from Settings.

What it's for:

Hanging a picture or a shelf, assembling furniture, leveling a washing machine, a tripod or a camper van, checking the slope of a ramp, a drain or a gutter.

An honest note:

Level uses your phone's sensor, not a certified instrument, and accuracy depends on that sensor (calibrating helps). For work with strict tolerances use a professional level. If your phone doesn't have the required sensor, the app tells you so.

Questions or ideas? Write to [email protected].