TiltArc
Utilities · Angle & Inclinometer
A digital arc level and inclinometer for iPhone with a 0.1° readout. Measure the angle of surfaces and objects, set your own zero and save readings, with no account and no internet.
Coming soon to the App Store
Try it Drag the slider or use the arrow keys to tilt the phone.
01Two views
A ball rolls along a shallow curved scale as the phone tilts, just like a classic analog instrument. The lowest point of the arc means level, and the large number shows the exact angle. At level, the ball and the number turn green and the phone gives a short vibration.
A bright line rotates with the phone and stays level with gravity, above a fixed dashed reference line. The angle between them is your tilt.
Switch views in the menu and choose which one the app opens with. Both use the same calibrated reading.
02Set zero
Tap ZERO and the current position becomes zero. Every reading after that is measured from there, for example the difference between two surfaces.
A ZERO badge at the top and a small marker on the arc show where your zero is. Press and hold ZERO to return to true level.
03Tilt warning
The phone measures best with the screen held upright. When it leans toward or away from you, the scale turns dashed. Lean it further and a badge appears while the number turns grey, so you know the reading is not steady.
The last three saved values stay in the corner for a moment, which helps when you are writing them down.
04Calibration
Your phone, case or holder can shift the reading slightly. Calibrate once on a stable surface you know is level, and the correction is stored and applied to every measurement.
| - | ZERO | Calibration |
|---|---|---|
| What it's for | One measurement | Your phone, case or holder |
| How long it lasts | Until you hold ZERO | Until you clear it |
| Where it applies | On top of calibration | Underneath everything, ZERO included |
The result is only as good as the surface you calibrate on, so use the most level one you have.
05Saved readings
Tap + to save a reading. The app saves the average of the last half second, so the small jolt of pressing the button stays out of the result.
Each reading keeps only the date, time, angle and view. Filter by All, Today or 7 days, edit or delete entries, average a selection, or export everything to a CSV file.
ProAverage and CSV export are part of TiltArc Pro.
06Designed for clarity
I wanted an angle meter that is as clear to read as a classic analog instrument. So the measuring screen has large digits, a calm dark interface and nothing else.
Shake the phone to open the menu. Saved Readings also opens straight from the Home Screen, by pressing and holding the app icon.
The buttons sit on the side of your dominant hand.
Show values to 0.1° or in whole degrees.
Open the app in Arc Level or Inclinometer.
A vibration, and optionally a sound, confirms ZERO and each saved reading.
07Specifications
Privacy
Price
One-time purchase, no subscription
