Free smartphone app Qustodian pays you to read adverts. Simply download the app, and plug your likes and dislikes into your profile. It then sends adverts matching your interests to your Qustodian inbox. You get paid cash when you view messages, respond to questions or watch videos.
It pays cash via PayPal when you earn £10. Forumites report the slow trickle of messages means it takes a while to hit this, so this app’s just one for committed online earners.