Simple Rally Computer
An easier way to navigate.
The Simple Rally Computer (SRC) app was written to address the requirement for a rally computer that is inexpensive, simple to learn and use, yet with enough features for the more experienced competitor. The user interface is modelled after the Zeron 660 or 880 rally computer of yore.
Note: If the app crashed on Android 7, go to Settings, Manage Applications, select this app and ensure that the Location privilege is enabled.
Check out the documentation