I’ve just come across this app -
Launching with unique food and drink experiences, Tail provides exclusive offers to try the latest and greatest London has to offer.
Built with the Monzo API, simply shop with your Monzo card to get cashback directly to your account.
Which has been built for Monzo users. It looks pretty good, considering the API isn’t properly ready for developers to use to access Monzo’s user’s accounts yet.
If you’re interested, you can now join their waiting list here -