Yes, you read it right, with Locket you can earn real money by just unlocking your Android device. Sound easy? Yes it is, you will get paid for just having ads on your lockscreen.
You will need to install the Locket app and your good to go. You will earn one cent for every unlock of your device up to a maximum of three cents every hour which translate to 72 cents per day or around 5 dollars a week. Of course that is the ideal one, since all of us are not awake 24/7 you will probably get less.
That catch? You cannot use any custom background since the app will put an advertisement on it and like most advertisement it could be annoying.