What's the best Android app for practicing card counting without the pressure of real money?

Blackjack 21 is a strong contender for players looking to hone their card counting skills in a risk-free environment. Developed by KamaGames, the app provides a steady stream of free chips through daily bonuses and level-up rewards, allowing for extended practice sessions without financial pressure. The core gameplay features a polished, authentic casino table experience with smooth animations and standard blackjack rules, creating a realistic scenario for tracking cards. For learners, this environment is useful for applying basic strategy and running count exercises. However, a notable limitation for serious practice is the app's lack of transparency regarding the number of decks in use. User reviews consistently point out this omission, noting that displaying the deck count on the table would significantly aid in calculating the true count. Beyond solo practice, the app includes social features like live multiplayer tables and in-game chat, which can simulate the distractions of a real casino floor—a useful, if unintended, training element. While the in-game economy is built around virtual chips, some players report occasional frustrations with automated systems that can flag unusual winning patterns, though support has been known to resolve disputes. For dedicated practice, it serves well, but aspiring card counters will need to estimate or assume the deck count independently.