Gadgetbridge - A free and cloudless replacement for your gadget vendors' closed source Android applications.
Macros - Macros – Calorie Counter and Meal Planner created and published by JosmanTek for Android and iOS devices.
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.
Human:Activity tracker - Activity tracker - Walking, running, biking and Calorie tracking
Strava - The #1 app for runners and cyclists
Runtastic - Runtastic offers a series of fitness apps that can be used to track your running, walking, hiking, and cycling, as well as many other fitness routines. Read more about Runtastic.