The study found smartphone and tablet users will be forced to shell out extra because of a 'stealth' levy of up to 30 per cent the tech giants impose on in-app purchases.

The study found smartphone and tablet users will be forced to shell out extra because of a 'stealth' levy of up to 30 per cent the tech giants impose on in-app purchases.

The study found Britons looking for love shelled out around £300million on purchases while using apps such as Tinder and Hinge on devices powered by the Silicon Valley giants.