KeepTrack is a free Android app that helps you track various aspects of your life, such as weight, medicine intake, and sport activities, among others. With KeepTrack, you can log values over time and view them in a multitude of graphs, statistics, and aggregations. The app allows you to define your own parameters, choose from a variety of data types, and set goals for each parameter.

The app features a beautiful and intuitive user interface, using the new material design language, and the KeepTrack Dashboard lets you view your current state from one screen. You can also set reminders to never miss a log entry. Analyzing your data is easy with line graphs, pie charts, calendar view, statistics, and more. You can easily aggregate log entries for viewing daily, weekly, and monthly data. Cloud storage keeps your data safe and synchronized among all your devices, and you can even share your parameters with other users.

Overall, KeepTrack is an excellent app for anyone looking to track various aspects of their life and gain insights from their data. While some features require in-app purchases, the free version offers plenty of functionality to get you started on your tracking journey.