Blackjack Strategy Video Source & Information:

Blackjack master is a game with a lot of fetures that will help you develop your card counting skills.
use the game card counter to improve your card counting skills.
use the built in bots to simulate a real game.
no internt needed you can play offline.
the game has 8 decks of cards just like the real game.

Blackjack master: https://play.google.com/store/apps/details?id=com.DefaultCompany.BlackJackMaster
Casino master: https://play.google.com/store/apps/details?id=com.DefaultCompany.casino2020version&gl

Source: YouTube