The backup feature allows you to send a backup file to your email address (via “Settings” > “Backup” > “Email Backup Now”) and then restoring it if necessary (just tap “Restore backup” under “Settings” > “Backup” and follow the instructions as shown in the app).
You can also save your data to iCloud/Dropbox and then restore them from there – please, kindly go to “Settings” > “iCloud/Dropbox”, then turn on “Use iCloud” or “Use Dropbox” and follow on-screen instructions.