Motion actuation

Devices often have sensors that can act as inputs. If you provide functions triggered by moving the device (for example, shaking or tilting) or by gesturing towards the device (so that sensors like a camera can pick up and interpret the gesturing), ensure the functions can also be triggered by conventional user interface components. Users with disabilities may not be able to operate sensors that detect movement, either because the device is on a fixed mount (such as a wheelchair) or due to motor impairments.

Since some users may accidentally trigger sensors due to tremors or other motor impairment, ensure users can turn off motion actuation.

There is an exception when motion is essential for the function, such as a pedometer that relies on device motion to count steps.