Here is a handy tip for PEFLog and Systolic users to transfer data to another device.
All data that you save is stored into your device only. You might need to transfer your data to another device in case you are switching to a new one or just in case if you happen to lose your device. In order to have the data available for another device, then Backup and Restore function does the trick for you. Check the details from the user instructions.