Use ancilla in a sentence. an aid for use as in understanding or accomplishing something; often, specif., a handbook, or manual. Origin of ancilla. see ancillary.
Making the world better, one answer at a time. The accelerometer in mobiles is used to measure the orientation or vertical and horizontal positioning of the phone. The most basic application of this is the device knowing when to alternate the view of the screen depending on how you are holding it.
What does the iPhone accelerometer do? Before we can say what the accelerometer of the iPhone does, we need to understand the basics of what an accelerometer does in general. The accelerometer is a device that can measure the force of acceleration, whether caused by gravity or by movement. An accelerometer can therefore measure the speed of movement of an object it is attached to. This is the job of the accelerometer in the Nike + iPod used in running shoes.