Block Unit Square has introduced "Tap to Pay" for Apple phones in the US.

Block's Square division announced on Wednesday that it has started offering "tap to pay" services to US retailers of Apple iPhones.

Sellers may accept contactless payments using their phones with this service, which is available in Square's point of sale iOS app, and it doesn't require any additional hardware or money out of pocket.

According to Square, a merchant will be able to take a payment simply launching the app, ringing up the sale, and then handing the customer their phone to finish the transaction.

No financial information was given.