Tennis Score Keeper is an Android app developed by Richard L that allows you to keep track of your tennis matches with ease. The app records set-by-set statistics and supports multiple scoring variations. It also has a changeover notification, the ability to undo/redo points, and a match timer. You can save and export completed matches for later review, which is especially useful for analyzing your game and finding weaknesses.

One of the best features of Tennis Score Keeper is the ability to tap on the player name for the same functionality as the 'win point' button. You can also edit a player's name or retire a player during a match by long-pressing on their name. The app shows ads when online, but the 'Remove Ads' feature is currently disabled due to some issues. It's worth noting that the network permission is only used for ads, and the app doesn't collect any user data.

Overall, Tennis Score Keeper is a great app for tennis players of all levels. Its simple interface and useful features make it a valuable tool for keeping track of your matches and improving your game.