mCommerce spending in the US reached $4.7bn in Q2, 2013, according to comScore. Thats up 24 per cent year-on-year, though down from last quarters spending ($5.9m). During the first half of the year, mCommerce accounted for 10 per cent of all online retail spending. 

comScore believes that, with the expected seasonal surge in Q4, mCommerce spending could exceed $25bn for the whole year.

Smartphones drove a considerably higher share (six per cent) of digital commerce than tablets (3.5 per cent), though this is due to the higher number of smartphones in use – the average spending per device owner is actually 20 per cent higher on tablets. 

“While mobile devices are already extremely influential in the overall buying process, they are also beginning to drive a meaningful percentage of digital commerce,” said comScore chairman Gian Fulgoni. “One out of every ten consumer eCommerce dollars is now spent using either a smartphone or a tablet, and growth in this segment of the market is outpacing that of traditional eCommerce by a factor of two, which itself is growing at rates in the mid-teens.”

The figures come as comScore adds smartphone and tablet sales estimates by product category to its measurement platform.