Fitbit is widely known and used across the world as a tool for exercise and diet goals. The basic version is free to download and use, while the premium version is offered for a fee. Fitbit allows you to record workouts, runs, and heart rate. You can track health data, set goals and log your meals and snacks, and the Fitbit food database has over 350,000 foods available for reference. You can also log your water intake to ensure you’re staying hydrated throughout your day.