Looks great, thanks for sharing! Overall I really like the design, and it looks very convenient in terms of accessing and using account details. Just a couple of questions on smaller details.
Following on from one issue Marta mentioned, it does seem that this tab is now misnamed. It’s more of a Profile tab than just about the card, as it’s where you access your personal details. And a lot of the things (limit information, topping up) apply to the account as opposed to just the card. (This applies in the prepaid app, too.)
One other thing I wanted to ask about is the choice of grey text on white for account number, etc. One or more people have mentioned that grey on white text is hard for people with vision issues. For supplementary information (like a preview of the note associated with a transaction in the feed), this is probably not a big issue. But for viewing these key details, it’s probably better to use a colour scheme that makes the sort code, account number, address, and monzo.me URL easy to read for as wide a range of people as possible. Definitely not my area of expertise, but just something that came to mind.
Overall very exciting, can’t wait for the full current accounts.