As of Dec 2017, there are NO killer cryptocurrency android apps
apart from frenzied speculation going on Bitcoin, which took a baton from Ethereum and ICOs earlier in 2017. This is NOT to say that cryptocurrencies have no value and are not tremendous invention. They are fantastic breakthroughs, but not (yet) in some killer apps but in turning the spotlight on the core issues of money and finance. But in 2019, there are a number of crypto apps which you can leverage. Some of them are Bitcoin Checker, Crypto Price IQ, Bitcoin Ticker Widget, Coinbase, and Coins.ph Wallet, among others. These apps harness the groundbreaking tech to provide the FIRST-EVER atomic swap for non-fungible asset and fungible token batches.