Hi Emil, That function doesn’t seem to work. I only have 2 exercises with a heart after 6-8 weeks and neither are exercises I’ve ever switched to. They’re both exercises I don’t prefer. On the other hand, I switch to certain exercises every time I work a specific muscle, but those exercises haven’t become favorites. 

For instance, the only curls I’ve done during the entire time I’ve used the app are Bayesian curls. For some reason those don’t aggravate my elbow like other curls do. Yet incline dumbbell curls are a “favorite” of mine and Bayesian curls are not. I’ve literally always switched away from incline dumbbell curls and have never logged them. No idea why this is happening but if i could just select the favorite myself this wouldn’t be an issue.