In addition to recording workouts and tracking progress on individual exercises, it makes sense to track things like nutrition, recovery, body transformation, etc.

You can enter nutrition, sleep, and body weight data manually - also, you can connect to Apple Health to exchange data with it (synchronization works both ways).

Exercises
This widget contains exercises that you have attached to your home screen.

Weight Lifted
This widget displays a training volume in strength exercises and a workload distribution across muscle groups.

Body Measurements
Record and track body weight, body fat %, and body parts circumference.

Sleep
This widget shows average daily sleep. If the app is connected to Apple Health (in Settings), it takes data from there. You can also enter them manually in this application.

Nutrition
This widget displays macronutrients and calorie average daily consumption. If the app is connected to Apple Health (in Settings), it takes data from there. You can also enter them manually in this application.

Photos
Allows you to upload your progress photos and compare them.

Supplements
With the Supplements widget, you can record your supplement intake.

Ingredients
Displays consumption of individual ingredients from supplements you consume.

You can compare different metrics across two date ranges—baseline and target. This can be helpful in understanding how, for example, changing your training program and nutrition matrix affects your progress, how quickly you are approaching your goals, what works for you, and what doesn't.