Lost all interest to the gym

Okay, I have been lifting for around 12 years now. My peak time was during university, I have very good physique, however, recently (about 2 years now) I feel I keep forcing myself to go the gym, and hating every minute of it and barely finish a full workout. While in the past, I was looking forward to the gym from the moment I wakeup, and I used to love every single set every single moment (hence it explains the results I got

Now, I want to try this bodyweight workouts at home.

Can someone please suggest me some good apps to start?