Earn passive income (Android Apps)

Below is the list of apps that you can install and start earning your passive income. This list will be updated eventually based on my knowledge accumulation on this.
1. Slidejoy [earnings $2]
2. Stepbet(small investment) [my earnings: ₹600+]
3. Don(referral code: E1A4877C)
4. Featurepoints(referral code: CFHMA6)

5. Bitcoin Farm 

6. Taskbucks

7. Pocket bounty (referral code: PB248709E)

8. Mobikwik
9. Swagbucks
10. PaidViewpoints