공부 타이머 - 공부시간을 측정하는 어플

When studying, you may want to know your net study time.
At this time, I just vaguely turn on the timer app and manage it, but I thought I needed an app to manage my study time only, so I made this.

The study timer I made shows the study time down to milliseconds and manages the study time in the personal cell phone database so that you can gain insight into how much you have studied.