This app is designed for all hard-working shift workers. You can add customized shifts. 
When editing your shifts, you can select a range of days (rather than one day) to set. Thus, you can set your schedule (roster, planner) in few seconds. Then, you can send the screenshot of your calendar to friends by clicking one button. If you have any suggestion/question, welcome to send an email to me. E-mail: [email protected] Developer: Chih-Yu Lin 
Permission Description: 
(1) Storage : With this permission, you can export the screenshot of your calendar created by clicking the 'Share' button. 

(2) Run at startup (execute programs after boot completed): The alarm clock will be restarted automatically after rebooting. This permission is required to achieve this goal. (3) Read Calendar: The events from other calendar apps will be shown in the Note page. (4) Control Vibration: This is used for the alarm clock function. (5) Notification: This is used for the alarm clock function so that the app can show the notification when the alarm ringing. (6) FOREGROUND_SERVICE, USE_FULL_SCREEN_INTENT, SCHEDULE_EXACT_ALARM, WAKE_LOCK: This is used for the alarm clock function so that a dialog can be shown when the alarm ringing.