There are many sites online these days where you can make money from surveys and apps.
By passive earning - I mean sites where you can run an app or program in the background on your mobile / laptop / desktop and can just leave them running which will earn you points.
The three top earners which I have found are:
Swagbucks Swagbucks is a site which has many different options for earning points. From surveys, joining sites, watching videos, mobile phone apps. Good for both passive earning and non passive earning. For more information on Swagbucks and how to make money from using the site - Click Here.
Mintvine Mintvine is a marketing research company. In many ways it is similar to swagbucks in the fact that there are many methods of earning points. They give users the chance of earning rewards for shopping locally, taking part in focus study groups and much more.
Prolific Prolific is a survey site where surveys have been submitted mainly by university students. It's a fantastic earner - but surveys can be infrequent. The surveys pay very highly and equate to an average of £8 an hour - although surveys tend to only be a few minuets long.