Fitness Logbook is a minimalistic and straightforward app for logging workouts and tracking progress. Using this app assumes that you are not a complete novice in fitness, and know how to perform exercises, what is a routine and training program, supersets, one rep max, and so on.
The app is free of charge and doesn't contain ads. No registration needed. All the data are stored on your device only, and we do not collect them. Backups are stored in iCloud if you will not prohibit this.
Below is a gallery, which is also a short overview of app features, and a few articles.