Mike Hogan, the boss of ZiXXo, a start-up near San Francisco, says that he is “disrupting the existing coupon system”, dominated by companies such as Valpak and Valassis in America.

Whatever system you use, unless you've done a coupon promotion and can simply count the number of coupons redeemed, tracking is the only way you can assess how effectively your advertising is working.

To improve and better target potential customers, the information system can be altered to remember the devices that take advantage of the coupon.