With Snapcash, users simply type out the dollar amount they’d like to send as part of any private message — for example, “here’s $5 for lunch.” The app recognizes the “$5” text and a green payments button illuminates next to the keyboard. Users can then tap that button to activate the payment, which is completed once the message has been sent.
Via: Snapchat to Let You Send Money to Friends, Thanks to Square | Re/code.