It is a timer that follows the Pomodoro technique to improve productivity by repeating focus time and break time. In many cases, I was too focused and continued to work without noticing the notification sound and vibration, so I made a Pomodoro timer app that sounds vibration for a long time. (I'm surprised when it's a sound, so I try to make only the vibration) It is a timer app that simply repeats the focus time and the break time, and the switch from the focus time to the break time is done