Over-the-top banking platform Curve has launched an instant cashback scheme, offering shoppers 1 per cent back on all purchases at major retailers.

The London-based start-up, which lets customers hold all of their credit and debit cards on a single card, said the scheme works by adding rewards to a Curve Cash card in its app, which can be used for purchases using its main credit card.

The FinTech said its partners in the offer include Amazon, Apple, Sainsbury’s, Waitrose, Uber, Spotify and Netflix, and has currently signed deals with around 50 brands to take part in the scheme.

Founded by Israeli Shachar Bialick in 2015, the firm said shoppers can claim the cashback wherever Mastercard is accepted.

Diego Rivas, product lead at Curve, said: “The launch of Curve Cash is just one example of the many ways Curve simplifies people’s finances, constantly delighting them by combining all their debit and credit cards into one and rewarding them with cash they can spend instantly.”

The business said its Curve Metal card holders will earn 1 per cent instant cashback on purchases at six retailers at a time, and can receive Curve Cash for an unlimited period, whereas Curve Black card holders will be able to choose three retailers at a time.

Holders of its free Curve Blue card will be able to choose three retailers at a time but the offer will last for 90 days.

In March, the business had 500,000 active users and over £500m had passed through the platform.