A free app for Android, by Liketivist.

If you are a runner or simply like to run, then RUNZI is the best free running app you can find. It has everything you need to track your performance and get the best results. It is free, easy to use, and it works offline.

The first thing you need to know about RUNZI is that it is not another GPS, nor does it collect any data. It works purely on the phone itself. The app uses its internal sensors to count your steps and calculate your running distance and speed. It also keeps track of the time you spend running and the distance you cover.