This is the hourly alarm app that was created using the video that was released through DSP Media Twitter ahead of the announcement of 'Clock' which Chae Kyung and Chae Won sung together.

* Features of the ChaeChae Alarm
1. Alarm can be set for each day of the week and for each hour.
2. There are no ads and also in the future.
3. No special permission is required.
4. Do not use background services.
5. Do not create additional icons in the status bar.
6. Provides the option to choose whether to alarm in various situations.