

To achieve fast startup and high-accuracy position estimates, you should provide:

Thankfully, there is more that can be done to prevent bad GPS data from being recorded than there is to repair it. If you experience any of the following, your activity may report a different distance than you actually traveled, and, unfortunately, it will not be possible for us to "fill in" the missing data or modify the existing data.

The GPS system includes the chip in your Android device as well as the satellites above the Earth. GPS is a system to estimate location on Earth by using signals from a set of orbiting satellites.
