When using Monzo, I’ve found it quite useful that it remembers the card I used to make the initial top up. This means I don’t have to have my alternate debit card with me all the time to top up. Currently with Starling, I need to either have the physical card to photograph, or a really good memory
The thing I don’t like about Monzos implementation is that this feature seems forced on you, and there doesn’t seem to be a way to forget the remembered card? It would be nice to be prompted if you want to remember the card whilst making the top up, and then have the ability to forget it as and when you choose.