In England, parents have had to fork out an estimated 30 million pounds for apps bought by their children without permission - that's more than 45 million euro.
According to research, unauthorised purchases are putting an extra 52 euro on a typical monthly bill.
And it seems eight-year-olds are the biggest unintentional culprits.
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Danny Kitchen is five.
He racked up a bill of over 1700 pounds - or well over 2,500 euro - in just ten minutes on his parents' iPad.
His mother Sharon is staggered:
