Shopify POS mobile
Limited functionality, features that are available on the website are not available on the POS app (payment methods for example), and the app crashes constantly.
We have to delete and redownload the app roughly once a week. I'm told this is due to potentially losing our internet connection, but this seems like something that their software should be able to record. However, as with many other problems we experience, we're told the issues are the way we're using their software and not a failing in their code.