wger

wger is a workout, nutrition and weight tracker that combines a community exercise database with a personal log of the sessions you actually train. You can build weekly routines with sets, reps and progression rules, plan meals from a large food database, log calories and macros automatically, record body weight and measurements, and keep a photo log of progress.

Gym members, coaches and home trainers use it to follow a plan instead of keeping paper notes, and it can be deployed with a ready database.

Self-hosting keeps your health history and progress photos on hardware you control, costs nothing per user however many you add, and makes the entire history a simple database backup.