Overall the app is good i think. so i can explain pros of blockhain application. the application blockhain is as biggest wallet address cyptocurrency safe and secure i think. we can save assets cryptocurrency for secured. and you can use Qr to Transaction in blockhain, its so good i think cause QR so simple to transaction. and Blockchain is active on many social medias and many famous medias such as The CoinTelegraph or CoinDesk. and if we want to make wallet, registration is quite fast i think. i rate it's 4 Stars cause i think in blockchain slow to access