UPI transaction have hit the milestone of 10 million transactions per day.

Proud to share that we hit 10 Million UPI transactions in a single day. #InstantPayments #10Million #DigitalIndia #HighOnUPI @dilipasbe pic.twitter.com/U3HAhDxGH1

— BHIM (@NPCI_BHIM) June 20, 2018

This is a steady increase from 169 M (Dec17) to 236 M (May18). An increase of 40% in 6 months.
UPI was launched in 2016.
With WhatsApp launching its full blown payment service, expect this number to grow in multiples.