Unusable on my iPhone6

The custom controls used on the settings screen are nonfunctional on my iPhone 6.
I can not set the time values. sometimes swiping with two fingers sets a seemingly random value.
generally the controls are completely unusable. I cannot change the snooze time away from 27 minutes for example.
The settings screen is completely broken.

typedlambda about WakeApp Pro - Scientific Alarm Clock & Sleep Recorder, v2.6.4