Martin Lewis, the founder of MoneySavingExpert.com, said it was "disappointing" that apps aimed at children have been allowed to charge "ridiculous amounts" for extra features. He said:
When games such as My Little Pony, which are obviously targeted at young children, bait kids with 69p purchases of a 'mountain of gems', something is going wrong in the system.
What's really disappointing is it's been allowed to get this far. Apple especially makes a play of only allowing approved apps in its store.
So why does it allow games that can be targeted at young children to charge such ridiculous amounts for in-app purchases?
As always, an OFT investigation, even if it does advise action, will take time. So the most important message meanwhile is to protect yourself.
More top news
Some 65 UK football fans have been arrested at Euro 2016.
Fans of ITV's popular and long-running soap will be treated to even more episodes from Weatherfield from late 2017.
Nicola Sturgeon has said she would not be fit to be First Minister if she did not do all she could to ensure they stayed in the EU.