The planner works on iOS, Android, Windows and Mac. If the PDF annotation app you use supports syncing on multiple devices using any or all of these operating systems (iOS, Android, Windows and Mac), then the planner should sync. If you would like to use a different PDF annotation app than the ones listed below, please see the app's website for sync information. Alternatively, you may be able to back up your planner through Dropbox, Google Drive or similar services and access the planner from all devices.
App Sync Information: