The company, which helps businesses optimise marketing campaigns, said its clients saw 3,100 sales per day from Apple smartphones
Performance marketing company Affiliate Window has seen a dramatic rise in sales through mobile devices.
In May, the company found 572 sales per hour were made via a mobile devices, with the iPhone alone generating 3,100 sales per day throughout the month.
Last month (May) 18.1 per cent of all sales were through mobile devices, up from 16.48 per cent in April.
Excluding tablets, mobile accounted for 7.5 per cent of sales, an increase from 6.7 per cent in April.
Mobile traffic also grew, from 19.1 per cent in April to 22.3 per cent in May.
The company, which advises businesses on how to grow their online operations, said it has recorded more mobile sales so fat this year than in did during the first eleven months of 2012.