Commuters can claim free travel on London public transport on October if they use Android Pay.
Mastercard is offering customers who use the Android Pay app a refund on travel costs of up to £30.50 on London transport.
The offer is available on October 3, 10, 17, and 24.
Android Pay users can also claim a free coffee or hot drink on these days at any Caffe Nero in England.
Mastercard UK and Ireland president Mark Barnett said: “Our fare free days across London’s transport network have been a big hit with our cardholders, but we wanted to go one step further.
“By also offering a free coffee at Caffe Nero, we hope that a Monday morning commute becomes a little more enjoyable in more ways than one.”
Android Pay, Google’s contactless payment system, has been available in the UK for around four months.