App does not function properly at all.
Timer runs faster than a standard second more often than not, usually after completing one timer cycle and trying to start another. It is not fixable without completely shutting down the app and reopening. I bought your premium to unlock further options that also do not work as advertised. I cannot make any changes to the values on your premium timers. Also none of input menus other than you feedback block have contrasting colors making it impossible to see if any changes are being made as far as times or typing input.