How to transfer data to Informant Sync from another sync service in Pocket Informant
Migrate an Account
Informant Sync on iOS has an automatic migration assistant that makes it simple to move from Google, or Toodledo to Informant Sync.
Add the Informant Sync Account
Complete an initial sync. It should be blank, but it initializes things and gets Informant Sync ready for the migration.
If you are not already in the Informant Sync Account page, go there and then click on "Sync Option".
Tap on the migrate button.
Select which existing sync account you wish to migrate the data over to Informant Sync.
Once this procedure is finished, the original sync account will be removed. Data on the original sync account's server will not be touched.
Please note that once the data is migrated there is no way to reverse the process.
MIgrate individual events, tasks, or calendars
Alternatively, if you only want to move specific Calendars from one sync service to Informant Sync, then you would first have to "unassign" the Calendars from their current sync account (Sync Settings -> choose sync service -> Sync Options -> Calendars to Sync), then assign them to the Informant Sync sync account. Moving a Calendar from one sync service to another will, of course, move all of the corresponding Events, Tasks, and/or Notes as well.