Motorcycle Lean Angle Tracker

Track how far you lean in every corner – left and right – using only your iPhone.

Curve Tracker turns your iPhone into a motorcycle lean angle tracker. The app uses the motion sensors built into your phone to record your lean angle through every corner of your ride – no extra hardware needed. After the ride you can see how far you leaned, in which corner and in which direction.

Rider’s view of a scrambler motorcycle on a mountain road with an iPhone running the Curve Tracker lean angle tracker in a handlebar mount

What the lean angle tracker shows

  • Your maximum lean angle of the ride, to the left and to the right
  • The lean angle of every single recorded corner
  • Where on your route each corner was

Mount the phone, start the ride

Mount your iPhone firmly on your motorcycle or motorbike, start a recording and ride. Look at your lean angle data once you have stopped – never while riding.

Draft: add setup steps and accuracy notes.