Almost perfect, ruined by major design flaw.
I was initially over the moon with this App! I would have given it 5 stars, it seemed close to perfect for my needs... however, I noticed the battery drain when using it was very high. It turns out that in order to function, this app must emit a constant quiet but noticeable hiss from the speaker. I messaged the developer, believing it was a bug they would fix. The explanation was that when the timer is on, the hiss must be emitted so that app doesn’t turn off the app when it’s in the background or the screen is switched off, or something to that effect. I.e., it is a feature that cannot be fixed. This seems ridiculous to me as there are so many apps that can run in the background without a constant hissing noise draining the battery in such a way. They implied absolutely no intention or ability to amend this problem, so I feel like my money was wasted upgrading to the pro version since now I basically don’t use the app. It’s a real shame because if it weren’t for that fundamental crucial flaw, this would probably be my favourite and most used app.