I use the Migros app regularly, for every purchase I make.

Here is some feedback:
1. the app remains active after shopping and prevents the iPhone from being switched off automatically (after 2 minutes, for example). This is extremely annoying, because the mobile phone is normally put back in the bag because you still have to push the shopping cart or carry bags, then gets extremely hot in said bag and drains the battery. No other app can do that........
2 I also find it a pity that coupons cannot be activated on the display AFTER you have reset the scanner.

So, although I am actually satisfied with the app so far, these 2 points are very nerve-wracking.