I want to log in and use existing data

iOS/Android

How to

1. Select "login" on the login screen
2. Select your option and log in

Log in after starting the use

1. Go to the main menu by tapping the image icon in the upper left corner
2. Tap the profile icon in the top of the screen
3. Select "Log in or Account Registration"
4. Select "If you already have an account, sign in."
5. The registered account will rewrite the current calendars. After resetting, the details you have added can't be restored.