For instance, you can go head-to-head with friends or even join a global challenge that awards you badges for your accomplishments. This fitness app is interactive and goals oriented, using clever gamification techniques to keep you motivated. We’ve gathered our top-10 picks for the best fitness apps to pair with your wearable devices in 2020. If you have a fitness tracker, wearable device or a smartwatch, you’ll need to choose an app to view all your newfound data on.