I used ProCamera, Halide and Camera+2 on my iPhone6+, but with my new iPhone13PM I can't see much benefit in any of these apps over using the Camera app.
I can see that specialised photography (e.g. focus stacking, astrophotography) require specialised apps, but not for general purpose everyday photos.
Can you give me some reasons to continue using any third party camera apps with the iPhone13PM?