RaceRunner is a run-tracking app designed by a passionate runner for fellow racers. This app caters to spectators as well, allowing them to monitor the progress of runners during races. With RaceRunner, spectators can conveniently start and stop timing runs, and even send messages to runners that are read aloud by the runner's phone.

Moreover, RaceRunner offers a unique feature where it can automatically stop timing a run after a specific distance, ideal for runners' time trials. Additionally, users can track shoe mileage through the app and receive warnings when mileage limits are surpassed, ensuring that their racing shoes stay in top condition. RaceRunner's open-source nature on GitHub encourages users to explore the source code and propose modifications. However, it is important to note that prolonged GPS usage in the background may impact battery life significantly.