Square has a new update out for its Cash app that lets users send cash by text, greatly improving the versatility of the mobile payment app. The update also improves the user interface for sending, reducing steps and increasing speed, and offers a host of new features like putting notes on payments and a new reward system that provides $1 each time someone you invite via text message signs up. The update also adds address book importing, profile pictures for user accounts, a unified email/phone contact listing and push notification/text message-based incoming transfer request approval.