Blackjack Trainer — master perfect basic strategy.
Questions, bugs, or feedback? Email jtaddeohpu@gmail.com and I’ll get back to you.
TwentyOne teaches blackjack basic strategy: study the full strategy chart, then drill the exact correct play for any hand until it’s automatic. Configure the table rules (decks, soft 17, double, surrender, splitting) and the chart and grading adjust automatically.
TwentyOne is for study and entertainment. It involves no real-money play and no wagering.
Most of TwentyOne is free. An optional one-time $4.99 purchase unlocks TwentyOne Pro — the expected-value breakdown on every practice hand and the Card Counting Trainer. Already bought it? Tap Restore Purchases on the upgrade screen to unlock it on any device signed in to the same Apple ID.
TwentyOne collects no personal data — everything stays on your device. Read the full Privacy Policy and Terms of Use.