Why does my Rigidbody jitter on mobile even with Interpolate?

Mobile fps is variable; Interpolate samples between physics ticks, but if render fps drops below physics tick, you see jitter. Match Fixed Timestep to typical render rate (1/60), or use Extrapolate for forward prediction.

Extrapolate downsides?

Extrapolate predicts forward, so collisions that would've stopped the body show jitter near impact. Best for smooth visual on free-flying objects; not great near walls.

Edit → Project Settings → Time → Fixed Timestep. Default 0.02 (50Hz) on PC; lower to 0.01666 (60Hz) for smoother mobile.

Fix: Rigidbody Jitters On Mobile Despite Interpolate

Quick answer: Project Settings → Time → Fixed Timestep = 0.01666 (60Hz). Rigidbody Interpolate on. Test on device, not editor.

Player ball rolls smoothly in editor. On Android phone, choppy motion. Physics tick at 50Hz against 60fps render produces visible aliasing.

The Fix

Project Settings → Time:
  Fixed Timestep:        0.01666     // 60Hz physics
  Maximum Allowed Timestep: 0.0333

Rigidbody:
  Interpolate:           Interpolate
  Collision Detection:   Continuous Discrete

Match physics rate to typical render rate; interpolation handles the small remainder. Use Extrapolate only for free-flying bodies.

Verifying

Build and test on device. Smooth motion. Profiler shows physics ticks aligned with render frames.

“Match rates. Interpolate fills. Smooth on phone.”

Related Issues

For trigger stay sleep, see trigger stay. For 2D slope, see 2D slope.

Match rates. Smooth.