Well...

I found this app recently, ember, which allows you to play minigames (towers, mines, spin-the wheel, etc.) and on these you can win a bunch, I've had the best luck with betting small amounts on crash and getting lucky. There's also "micro games" which are (at the time) 4 rewards websites where they let you download games/apps and complete objectives in there for a few thousand Satoshi's (bitcoins) Some rewards can even go up to 80,000 Satoshi's for the microgames, which is around $76 bucks. You can also make sports bets and compete in tournaments, both free and paid. It doesn't require that you put any real money into the app, and is very user friendly. I made around $15 just from a few hours of playing on my first day, so all around i think its a decent app to make a quick few dollars if you're bored. I'm still new to it, so if anyone else could provide some details or pointers, that'd be great, Thanks!

psst....

(also, with a referral code, it lets you get 12 free satoshis an hour just by keeping the app installed :p)