Hotlap is a free Android application created by Extravehicular Activity Inc. aimed at track day enthusiasts. It is a social GPS lap timer and data logger that allows you to compare and provide feedback on performances, follow your favorite drivers, and build a following.

With Hotlap, you can easily time your laps by selecting the "Drive" option upon arriving at the track. The app also features data analysis, allowing you to compare your performance with your personal bests or other sessions.

Hotlap also has social features, such as the ability to customize your driver profile and share your performance data for community feedback. You can also create a network of friends who share the same goal of going faster and climb the leaderboards.

In the future, Hotlap plans to include video capture and sync with data, virtual competitions for prizes, and vehicle configurations to keep track of your setups. Overall, Hotlap is a great tool for any track day enthusiast looking for a social approach to GPS lap timing and data logging.