Citizen Me is a survey based app available on both IOS and Android phones. The app will show you a list of available surveys. Some are just for fun surveys and some paid surveys.  The surveys are super fast to complete, usually no more than around 6 questions. The payment for answering is low, often 10p, but they add up and you are paid immediately to your PayPal account. Surveys are pretty frequent, mostly daily and occasionally you get clusters of related / themed questions come through over the space of a few hours.