The most frequent use I make of the Barclay's app is to top-up my Monzo card. The Monzo app (and Revolut, but for some reason I use Monzo more than my Revolut) is just better. It is more focussed on my daily use and has a more pleasant interface. It does not do as much as my Barcaly's account but it does the 95% most frequent banking activities a lot easier.