Make the call
Play complete hands with configurable table rules and realistic legal actions.
Offline strategy practice · No in-app economy
Think the hand.
Learn the odds.
Train blackjack decisions with basic-strategy guidance and probability insights calculated from the cards still in the shoe.
No account · No ads · No tracking · No real-money gambling
Dealer shows
6♠
Your hand
Basic strategyStand
42% win
8% push
50% lose
Built for deliberate practice
Every hand teaches you something.
Check the strategy
Compare your decision with basic strategy at the moment it matters.
Understand the odds
Explore dealer outcomes, bust risk, and expected-value estimates based on the remaining shoe.
Private by design
The table stays on your device.
Blackjack 21 IQ works offline and collects no personal data. There are no accounts, analytics, advertising SDKs, or tracking.
每一手，都更懂策略
离线练习二十一点决策，结合基础策略提示和牌靴概率分析。不含应用内经济系统或真钱赌博。
一手ごとに、判断力を磨く
基本戦略とシューに残るカードから計算した確率を確認できる、オフラインのブラックジャック練習アプリです。