I dont use any fitness apps, just youtube for workout and timer for running. I used to track my calories, though, but stopped for several issues.
Personally more than one app. for tracking my runing journey i use the adidas app and for other workouts i like to use the pam app or the lean app
Healthyfi me is the app that I used to track because I want to bulk my body because iam in underweight but i always face the failure at the end