Angle Measure: Hinge & Level

Angle Measure turns iPhone Duo into a measuring instrument. Open the phone and the protractor shows the angle of the hinge, in whole degrees, as you fold.

ANGLE
• Live hinge angle on a 0–180° protractor
• Hold freezes a reading so you can still read it after you move the phone
• Zero measures from any starting angle
• Session low and high, folding speed and a side view of the fold
• A tap at 0°, 90° and 180°

COMPASS
• True or magnetic north
• A bubble level in the centre for laying the phone flat
• Coordinates and altitude

LEVEL
• Flat bubble level and edge level, chosen automatically
• Set a reference to measure tilt from any surface
• Partly fold iPhone Duo and each half gets its own level

SENSORS
• Acceleration, rotation rate, gravity and attitude
• Magnetic field strength
• Air pressure and altitude
• Speed, course and GPS altitude
• Steps, floors and current activity
• Battery and thermal state

Made for iPhone Duo: layouts stay clear of the fold, the tab bar moves to the side on the cover screen, and the compass and level read from the half of the phone they're shown on.

Private by design: no account, no ads and no tracking. Your readings stay on your phone.

The hinge angle needs iPhone Duo. The compass, level and sensors work on any iPhone that runs the app.