4 stars: What the app does really well: The Coach generates tough and balanced workouts. The UI for the actual workouts is pretty good. The actual training program is varied enough to be engaging and it's appropriately challenging. User feedback changes the next week in the right way. What the app needs badly: The ability to edit workouts and integration with other Freeletics programs like a single portal for all of the programs. As others have said, the workouts are sometimes not public gym friendly. I'd rather have a single portal for all of Freeletics than to have them change the workouts though.
4 stars: I used the paid version for about 6 months and definitely made good progress. It's easy to follow. I liked the videos and timer. Workouts are challenging. This would be a 5 star app if it included more variety, e.g. dumbbells. Some days I just make up my own routine to get out of the monotony of the same workouts. It also dovetails well with Freeletics bodyweight. The member network didn't work out for me since I'm a senior in a small city.
4 stars: The app is great but it is not public gym friendly for the workouts as every upper body and lower body exercise requires if to be a smooth exercises, 2 barbells. It's not conducive to have a single bar bell and constantly changing the weights for 2 types of exercises within a set. Especially in a public gym where it's virtually impossible to tell another gym user that hey I'm gonna use 2 bar bells bear with me....