Square Point of Sale is the app that made credit card processing available to anyone with a smartphone or tablet. In 2015 we did an overhaul of the Android app, introducing a new visual language and bringing it to feature parity with its iOS counterpart.
Since Square sellers might use multiple devices with different operating systems in store/café/restaurant location we wanted to keep the experience consistent across iOS and Android, leading us to share many existing design patterns from our iOS app, while still adhering to Android guidelines where applicable.