There's a good chance you often find yourself killing time by just sitting idle and browsing through your smartphone.

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Why don't you make the most of this time by downloading an app that will earn you extra money?

Here are three legit apps that can easily pad your wallet:

1. Foap

This app turns your photos into money.

So if you are a social media photo expert, and you want your dreams of making money with photos you have taken come true, this app is for you. 

The app, which is both on android and ios pays you for the photos taken on your smartphone, whether you are a professional or an amateur photographer.

All you need to do is download the app, upload the photos, and wait for marketing and advertising agents to buy them for their projects.

Payment varies from $5 (Ksh 500) per photo.

2.SlideJoy

This is a fairly interesting app that requires the least effort.

So what's the prize? Your eyeballs. The app places ads on your lock screen, and every time you unlock your phone, you get paid.

In short, you get paid for allowing an ad to run on your phone.

3.Money

Just like its name suggests, you can make money using the money app.

This app lets you earn points from watching videos, completing surveys, giving opinions and playing free games.

Once these points accumulate to a given number, you can redeem them for dollars which are sent to your PayPal account.