Founded by three Norwegian entrepreneurs, Jaja is a credit card “built for the digital world”. You do get a physical card, but it’s all about quickly applying online and then managing the card directly from the app.
A Visa card. Jaja credit cards are issued on the Visa network, which means they are accepted pretty much anywhere with 20 million locations worldwide.
A mobile app. You can manage your card online, get instant notifications when you use it and tag your spendings to make budgeting easier and smarter.
Fee-free spending abroad. Jaja won’t charge any fees if you use the card outside the UK.
Jaja is advertised as a fee-free credit card, and looking at its specs, it looks like it’s (almost) true:

There’s no annual fee.
You won’t be charged for using the card abroad, nor for withdrawing cash. But do keep in mind that the interest-free period doesn’t apply to cash withdrawals, so it’s still a bad idea to use the card at ATMs.
There’s a £12 late payment fee.
Other key features will include an up-to-56-days-long interest-free period if you pay off your bill on time every month and an 18.9% APR (Average Percentage Rate). Depending on your personal situation, you can get between £250 and £20,000 of credit.