When it comes to sending people cash, there are a few really good methods: PayPal, Venmo, and Square Cash. Unfortunately, the latter method had no way to "store" money until you needed it...until now. Today's update to the app has a new feature called the Cash Drawer, which allows Square Cash users to stash cash in the app for sending future payments.
Users can still cash out to their bank whenever they want, but the app now has a redesigned Activity screen that makes it simple to keep track of outstanding payments or approve requests. The update is free and available immediately.