Please follow these steps for data backup and restore from Android device to Android device.
1. Perform "Data backup" in ATracker from the device you want to export data. This function can be found in the "..." tab. You can either save it to local device or email out.
2. Open ATracker on the new device, tap "..." tab and tap "data backup" once. It will create the "DataBackup" folder in "storage/Android/data/com.wonderapps.ATracker".
3. Copy the backup file you created from step 1 to "storage/Android/data/com.wonderapps.ATracker/DataBackup". Different Android phone vendors have different app (e.g. "Downloads" / "Explorer" / "File Manager") for this task.
4. In ATracker on the new device, tap the "data restore", it will find the file you just copied and you can proceed with restoring.