Gadgetbridge - A free and cloudless replacement for your gadget vendors' closed source Android applications.

Calorie Mama AI - Automatically count calories by taking food photos

fitbit - The Fitbit mobile app is for people who use Fitbit fitness trackers to keep track of their activity goals, food plans, and other fitness related things. Read more about fitbit.

MyFitnessPal - Track the number of calories that you consume each day with MyFitnessPal. The app also lets you create a diet and track the exercise that you complete each day whether it's walking, running or some other type of program.

Strava - The #1 app for runners and cyclists

Fuel - Fuel is a data pipeline framework for machine learning.