Top 5 free bitcoin earning app for android. Earn free BTC. 

1. Bitcoin blast - earn free bitcoin

Bitcoin blast is a Android app to earn free bitcoin. Play games and earn free bitcoin. It is a app by billing. Billing is a most popular app developer company for bitcoin earning app. Download this app from playstore for free.

Payment

The only requirement is that you register and login before playing. No tricks or hoops to jump through to receive your Bitcoin - just download, register and start playing to start earning Bling Points right away that you can convert to Bitcoin. To convert your Bling Points for Bitcoin, you will need to create a free Coinbase.com account.

2. Bitcoin Blocks- Get btc

Bitcoin blocks is a Android app to earn free bitcoin. Play match games and earn free bitcoin. It is also a app by billing. You can also Download this app from playstore for free.

FEATURES:
- Earn 1000 Bling Points to cash out to Bitcoin!
- Cash out every 7 days!
- Win or lose, always earn Bling Points!
- Make powerful combos to blast the  blocks!
- Zero transaction fee cash outs to Coinbase!
- Easy and fun, yet challenging unique levels!

Payment

The only requirement is that you register and login before playing. No tricks or hoops to jump through to receive your Bitcoin - just download, register and start playing to start earning Bling Points right away that you can convert to Bitcoin. To convert your Bling Points for Bitcoin, you will need to create a free Coinbase.com account.

3. Bfast Bfree

Bfast Bfree is a legit bitcoin earning app for Android mobile. Play easy games and earn bitcoin for free.
The app is most popular in internet as a free bitcoin earning app. You can find videos in this app on YouTube.

Payment  and referral

You only need a Coinbase account and that's it. You can now earn Bitcoins automatically in seconds.

You can refer your friends and earn 5% of their withdrawals. You can make as many withdrawals as you want, just remember that to prevent SPAM, only one withdrawal is allowed
every 3 days.

Here you will find a way to earn some Bitcoins easily. NO application will make you rich AND NEVER make you quit your job completely. It is just a way to earn a few pennies.

4. Free bitcoin cash

Free bitcoin cash is a app by bitcoin alien. Earn free legit bitcoin from here. You can find this app on playstore and appstore.

Payment

You can get payment on any bitcoin account easily.

5. Bitcoin solitaire - Get real bitcoin

Play solitaire game and earn free bitcoin. Download this app for free and earn.

Payment

The only payment method of this app is coinbase account. Create a coinbase account and get payment.

Conclusion

I think the best bitcoin earning app is Bitcoin blast and the Bitcoin Block. You can also try the other apps. All the apps are best.