PLEASE UPDATE!!
The most important is to cancel the screen auto shut off - please leave it on until app quit!! I liked the previous (1.1) version of PolyTune very much. I used it every day, but the new version has critical problems: 1. It is much harder to read (especially from a small distance) 2. The screen dims after a very short time which is very annoying. As a t.c electronics real lover, I wish these two issues will be fixed a.s.a.p in next update. And I hope such an update is going to show up soon (iPhone 8 Plus, ios 12)