TATTA - GPS Workout Tracker is a free iPhone application developed by R-bies Co. Ltd. It falls under the Lifestyle category with a specific focus on Health & Fitness. The app is designed to help users track their daily training, participate in online races, and share and compare their progress with rivals.

One of the standout features of TATTA is the ability to join online races at any time and from anywhere. Users can compete against their rivals and challenge themselves to achieve new goals. Additionally, the app offers training rankings, allowing users to apply their training progress towards their next race. Users can also record and edit their lifetime race results, providing a comprehensive view of their running journey.

TATTA also provides detailed training data, allowing users to review their training log and improve their approach. The app presents this data in beautifully arranged charts, making it easy to visualize progress and identify areas for improvement.

It's worth noting that TATTA utilizes the Motion & Fitness feature and integrates with HealthKit to export workout data into the Health app, providing a seamless experience for users.

Overall, TATTA - GPS Workout Tracker is a comprehensive and user-friendly app for tracking workouts, participating in online races, and staying motivated in your running journey.