Here we will describe the categories of the apps that gives you money for signing up.
1.Promotional apps
2. Task based apps
3.Gambling apps
4.Survey apps
5. Others
Promotional apps :
The apps gives you unexpected rewards for downloading and signing up, as they are not famous so this is the marketing policy they follow.
Note: You can't get these apps from Google Play Store or any app store they are only available in there official site. You can regard Angle One as example, earlier it was unknown but now a days they are from top leading Trading app in India.
Task Based Apps :
The apps give you task to do, like watch video , install affiliate apps , play games etc.
Example: Taskbuks, Swagbucks, Taurus etc.
Gambling apps:
Apps like Teen Patti, Dream11, Rummy,Casino give a chance to earn money by playing online with Real players and it's dangerously growing in India, it's actually effecting Teens and Students.
Survey apps:
Some apps and websites provide you surveys and this surveys are for research purpose. If your answers match the quality you will get a lot of money as reward, and you can easily withdraw them in cash apps.
Example: Google Opion, Pawns.
Others :
There are also some apps which gives you money in every refferal besides for writing blogs, novels, promotions financial products etc.
Disclaimer: Overall earning money from apps is enjoyable but it can leak your data.