GPS Race Timer is a utility app designed for iPhone users to measure acceleration times such as 0–60 mph, 60–120 mph, and 1/4 mile without the need for extra hardware. The app operates by setting up parameters while stationary, allowing it to start measurements automatically based on speed or detected motion. Users can save results locally and export them to other devices, providing flexibility in data management.

The app comes with preset timers for various distances and speeds, including 60 ft, 1/8 mile, and multiple speed intervals, all of which are customizable. The free version allows two measurements per run, while an optional PRO version offers features like parallel timing, elevation difference calculations, and reaction-time measurements, enhancing the overall functionality for serious automotive enthusiasts.