ClickPay

ClickPay is an interesting way to earn money quickly and easily. All you have to do is create a user account and ClickPay will automatically start showing you a series of ads that you have to tap on. After tapping on a few ads, you'll receive some points, though how many depends on how long the ads run.

When you get 500 points, you can cash them in for real money that will be paid to your smartphone.

If you have lots of free time and you don't mind watching ads, ClickPay might be a good way to earn a little extra money.