Good day
The Migros app is actually very good and I use it every day.
However, the Cumulus vouchers often cause problems. Even if they are activated, there have been a few times when they were not automatically deducted when paying after self-scanning or at the self-checkout.
Due to Migros' large database and the various "Migros", I am aware that errors can occur.
However, it would be a good option if the barcode were also available in the app for each code, so that it could also be scanned manually if the vouchers are not deducted automatically.