I have been using the APP for some time now very successfully, however i am working in Spain and it has stopped to sync !
Any clues or is it just a coincidence.
Using WIFI by the way.
It shouldn’t really matter where you run it from as long as you have a stable connection.
For any receipts that haven’t synced you can manually email them from the receipt preview screen in the app. Just ensure your email is setup on your account first (see here).
Sometimes it can fail if the connection is disrupted momentarily. If the problem persists you can also try using CamScanner, this is what I use for importing receipts into QF on Android.