Please follow these steps for data backup and restore.
1. Perform "Data backup" in ATracker from the device you want to export data. This function can be found in the "..." tab. It will send you an email with database backup.
2. Open the email on the device which you want to import data to and tap the attachment named "backup.ATracker" then select "ATracker Lite" (or PRO) to import the database. It is recommended to use Apple Official email app or AirDrop function. Some third-party app does not support data import into ATracker.
3. It will open ATracker and ask you whether you want to import data or not. Choose yes.
4. Now the data is imported.
In order to keep data consistence, if you have Dropbox sync enabled in ATracker, you must disable Dropbox Sync on all of your devices using ATracker and choose option delete server data when you disable. Or manually remove Dropbox/Apps/ATracker/MainStore.v2 or Dropbox/Apps/ATrackerPRO/MainStore.v2 folder.