The service is being piloted in in Los Angeles and New York City with an overlay of offers available nationwide at merchants like Baskin-Robbins and Dunkin' Donuts.

Josh Silverman, president of the US consumer services group at American Express says: "In an increasingly crowded marketplace, where consumers are bombarded with daily deals, we saw an opportunity to help our cardmembers save time as well as money by curating meaningful offers for them."

Users of the card scheme's iPhone app are presented with a list of offers that are ranked according to the cardholder's prior spending history and location. A dashboard feature displays offers added to the card, savings made and expired coupons. To redeem an offer, users add it to an eligible American Express card to make the qualifying purchase. Savings are automatically delivered via a statement credit within three to five days.

The new offers engine is the latest advance on the daily deals front by American Express, which has rolled out similar spending programmes linked to Facebook, Twitter and foursquare.