"Built for your smartphone, this is banking like never before. One that updates your balance instantly, gives intelligent notifications, and is easy to use."
In its own words Monzo says it's: "focused on building the best current account in the world and ultimately working with a range of other providers so that Monzo can be an intelligent hub for your entire financial life."
The app will instantly update your balance, provide handy notifications and display a neat visual way of seeing where you spend your money. You can also use the app to freeze the card if it's lost or stolen. The card won't be blocked if you go abroad, plus there are no fees or charges when using the Monzo card outside the UK.
I've been using it for a couple of days now and it's brilliant so I thought I'd spread the word!
EDIT: Yes there are similar cards for spending money abroad with no fees, but the emphasis with this is the features when using it within the UK.
Available on iOS: https://itunes.apple.com/gb/app/monzo/id1052238659
and Android: https://play.google.com/store/apps/details?id=co.uk.getmondo
(don't worry about the negative reviews, these were for a previous version of the app)