A 194 per cent rise year-on-year.
A quarter of VoucherCodes.co.uk's 5.5 million subscribers now redeem deals via mobile devices – equivalent to around 1.3 million people.
In Q2 2011, mobile only accounted for nine per cent of the deals, which translates into a 194 per cent increase year-on-year.
Meanwhile, the VoucherCodes.co.uk mobile app now accounts for 52 per cent of all offline (non-website) redemptions ahead of printable vouchers, rising from 20 per cent in October 2011.
Apple devices accounted for 80 per cent of the traffic, while Samsung and HTC pulled in just six and four per cent respectively.
Max Jennings, co-founder of VoucherCodes.co.uk, said: "Consumer appetite for discounts is voracious and while the printable voucher market is still growing very quickly, the rapid adoption of smartphones has meant we’ve seen the number of app redemptions overhaul printables for the first time ever.
"The final barrier to mass adoption is retailers themselves, as the integration of mobile technology into merchants’ point of sale till systems requires buy-in and serious investment. However, with increasing consumer demand for smart, mobile solutions, we’re seeing more and more merchants embracing these exciting new technologies to help drive marketing strategies."