Transactions through India’s homegrown Unified Payments Interface — which allows mobile apps run by retailers, airlines and other firms to take payment directly from bank accounts — reached almost half the value of debit and credit cards swiped at stores last month, central bank data show.

“Payment integration into popular apps in India will drive the digital payments market to $1 trillion over the next five years,” Credit Suisse Group AG said in a report last month. “With 800 million bank accounts now linked, the bulk is mobile-transaction ready.”

With WhatsApp’s QR code integration, expect boom !