Track Runner 5.0 wants to run free, and donations are encouraged to help keep it that way

The Track Runner app for Windows Phone is incredibly popular and highly-rated (4.8 out of 5 with over 600 reviews), but making so awesome of an app free of charge and free of ads means revenue’s an issue. So developer The App Cauldron is offering users the option to donate to support the app, and development of version 5.0 of Track Runner.