Using the application you can backup your calendars to JSON file that can be used later to restore on another phone. This is the only application in market that restores all events on another phone even that phone is not having the calendar you did backup from (the events will moved to another available calendar) You can also PDF/ePUB your calendars using the application to print them or keep soft copy. Application will always give you a choice to backup only required calendars as well restoring them on another/same phone later. The calendars those are not present on phone where you want to restore can be moved to a calendar of your choice.