TrackDay Pro is a comprehensive lap-timer application designed for track day riders and drivers. The app allows users to capture GPS data and automatically calculate lap times for each track session. Users can download tracks for free, create custom tracks using the built-in editor, and analyze race lines with the Track view feature. Additionally, the app offers over 270 track configurations worldwide, with an option to request new tracks for inclusion.

One standout feature of TrackDay Pro is the ability to email raw GPS data for further analysis outside the app. However, users should note that prolonged background GPS usage can impact device battery life significantly.