Good App
As others have said it takes a little while to figure out how all the features interact. But I got it set up to implement my Pomodoro technique. When the timer period is over it goes into End Actions which has a number of features. I choose to have end actions repeat until manually stopped. The screen flashed alternately red and blue - like police car lights. I’m usually wearing a headset so I done gave any sound alert and you can have it vibrate which you can feel if the phone and/or stand is directly on the desk. The key thing is the end of timer alert flashes until I shut. It off. You might not notice it for a few seconds but it can’t escape your attention for long- making it the perfect Pomodoro timer.