Very curious about what you dislike about lifting trackers.
I built a weightlifting tracker primarily for myself a little while ago and also published it. I tried to keep the UX as simple as possible. If you're ever looking to try out another app, give it a shot! https://titangymapp.com.
Titan looks similar to the workout app that I'm developing: EverBeat!
I'm also developing it for myself right now, that's why it is Android only atm.
My goal is to employ subtle gamification to get the user/me to the gym more often.
I was wondering where you got the data from to know what muscle group is used in each exercise?
I built a weightlifting tracker primarily for myself a little while ago and also published it. I tried to keep the UX as simple as possible. If you're ever looking to try out another app, give it a shot! https://titangymapp.com.