This assumes the app isn't ransacking your device for as much personal or saleable information it can find, in addition to the nominal purchase fee. Informatio

This assumes the app isn't ransacking your device for as much personal or saleable information it can find, in addition to the nominal purchase fee. Information leakage between sites and apps on mobile no doubt varies wildly based on your configuration and willingness to accept apps requesting outrageous permissions, but I'd suspect web-apps to be easier to protect yourself from, as a user.