Tennis is an Android application developed by SpeedyMarks that provides users with an updated schedule and countdown to upcoming ATP and WTA tennis tournaments, including grand slams. This app also shows running tournaments and is completely free to use, supported by ads.

With the 2021 tour dates already updated, users can easily access the schedule and countdown to the next tournament. The app also provides information on the current running tournaments, making it easier for users to keep up with the tennis world. The app is user-friendly and easy to navigate, with a clean and simple interface.

In addition, the app has been updated for the 2023 tour dates, ensuring that users have access to the latest information. With its ad-supported freeware license, users can enjoy all the features of the app without any cost.

Overall, Tennis is a great app for tennis enthusiasts who want to stay up-to-date with the latest tournament schedules and countdowns. Its user-friendly interface and updated information make it a must-have for anyone interested in the tennis world.