Since firmware version 0.6, RepOne Sensor has the ability to tilt to locally navigate reps on its screen. As the arrows suggest, tilt left to navigate to older reps, tilt right to navigate to newer reps.
If you're having trouble effectively tilting your device, here's a quick example of what a good tilt looks like vs a bad tilt.
There are some protections built into our tilt functionality that prevent it from deleting reps when shaken or tossed in a bag. If you're into this kind of thing, here's a diagram of the tilt state machine that controls this movement.