The Pit - A powerful crypto exchange from Blockchain
Google Pay - Make secure payments right through your Android device.
CoinSwitch - First cryptocurrency and altcoin exchange aggregator.
Cash App - The easy way to send, spend, bank, and invest.
PowerTrade - Trade BTC & other crypto options on the go, now on iOS
Venmo - Venmo is the best way to pay your friends. It's simple, fun and free to use.