May 13, 2016 - Toronto based developer, Christina Lau today introduces TennisKeeper 1.1, a new app for tennis players to track their tennis activities and to make every tennis day memorable. Keeping track of match facts helps you stay focused and is a great way to understand your progress. If you are playing tennis as a workout to lose weight, TennisKeeper keeps track of your calories burned and help you reach your goal. Your tennis will never be the same again. Version 1.1 includes many new features.