This app was mentioned in 2 comments, with an average of 5.50 upvotes
Mobile Performance Meter is a total passive money making app out of your cellular service. It collects data on how you use your cellular service in the background and gives you points everyday for redeeming gift cards. I like it because it's passive, and non-intrusive on my phone. You get around $5/month depending on the kind of service provider you use. Do monthly survey and other surveys to amass points faster.
If you have spare Android phones, you can run Yolotto on it 24/7 to earn passive money (max 5 phones). Tap the "Watch and Earn" button and it plays ads continuously and accumulate Yoobux. You can cash out Yoobux to PayPal or Amazon gift card. Feel free to use my referral code 8Y8VUZ after confirming your account email and it will give you a cool 10 Yoobux to start with.
Got this in my email:
Important YooLotto Service Alert From Our Advertisers:
Our advertisers have informed us that all customers need to upgrade to the latest version of YooLotto on their Android phone immediately.
Please note: you need to upgrade to version 7.29 immediately so you can continue earning points. You will not be able to watch and earn on earlier versions.
If you have not done so already upgrade now: https://play.google.com/store/apps/details?id=com.yoolotto.android&hl=en
Note: this is specific to Android phones only.
Thank you, The YooLotto Customer Support Team