Would you be willing to view a few ads a day in exchange for cash? If so, that's exactly what Fronto offers: this app displays news and ads on your Android's lock screen. You'll earn points for viewing or interacting with each ad (plus occasional bonus points), which you can exchange for cash, coupons or Amazon gift cards. While earnings aren't high, the effort on your part is almost non-existent—and the points earned will add up.
One thing to be wary of with Fronto is bandwidth and battery use. Downloading and displaying ads will take a toll on both, and if you already struggle to keep your phone charged all day this may not be a top choice.
What you do: View ads on your phone's lock screen
How much you're paid: From $0.01 to $2 per interaction, make $0.20 per day for just checking into the app
How you get paid: PayPal, Amazon, Visa, Target, Google Play, Walmart, Starbucks, CVS, Burger King, Papa Johns, Nike, Sephora, AMC Theaters, Best Buy, GameStop, PlayStation, Xbox, Fandango, Nordstrom Rack and Foot Locker gift cards
How much you need to make before cashing out: $1
Want more ideas? Check out our story on 9 Apps that Let You Make Real Money