Top 5 android app which pays free bitcoins:

BitMaker – https://play.google.com/store/apps/details?id=com.cakecodes.bitmaker&hl=en

Free Bitcoin - https://play.google.com/store/apps/details?id=weekend.bitcoin.free&hl=en

Free Bitcoin - BTC Miner - https://play.google.com/store/apps/details?id=com.freebitcoin.beastmminer&hl=en

Bitcoin Miner Android - https://play.google.com/store/apps/details?id=coinminerandroid.coinminer.cma.coinminerandroid&hl=en

Bitcoin Miner Robot - https://play.google.com/store/apps/details?id=hcss.killua.bitminerrobot.bitcoinminerrobot&hl=en