CircuitStorm and SoloStorm Data Logging and Analysis Software for Android are built on the same platform, but they support different racing modes and were created for different communities.
SoloStorm was created for serious Solo racers looking to win Autocross, ProSolo and Hill Climb championships but also attend track days and race Time Attack on occasion.
CircuitStorm is intended for serious road racers who also compete in Time Attack or Endurance Racing. CircuitStorm also serves the recreational lapping day and driver education market, supporting a path up to competitive, timed events.
Here is a list of what each app supports: