Blackjack Trainer: TwentyOne

TwentyOne: Blackjack Trainer is a blackjack training app focused on helping players build faster, more accurate decision-making through realistic practice drills, structured training modes, and performance tracking. Whether you're learning basic strategy for the first time or refining years of instinctive play, TwentyOne is designed to help you practice with purpose and improve through repetition.

PRACTICE WITH PURPOSE
Train with realistic blackjack hands and customizable rules that let you focus on the situations where you need the most improvement. Every decision includes instant feedback so you can quickly learn from mistakes and reinforce correct play.

Configurable rules: H17/S17, Double After Split, Surrender
Focused practice drills for hard totals, soft totals, pairs, doubles, and surrenders
Immediate feedback showing the correct play and explanation behind it
Fast-paced training designed for repetition and muscle memory

Also includes card counting practice modes built around the Hi-Lo system. Train instant card recognition with Flash Drill, maintain accurate running counts through timed card sequences, or push your limits in Ramp Mode where the speed and difficulty continuously increase.

LEARN THE RIGHT PLAY
Supplement your practice with structured lessons that explain the reasoning and math behind each decision. Lessons are designed to reinforce understanding alongside repetition-based training.

6 modules / 40+ lessons covering fundamentals, hard hands, soft hands, pairs, advanced concepts, and more
Interactive examples with instant feedback and explanations
Module quizzes and strategy chart highlights to reinforce learning

TRACK YOUR PROGRESS
Detailed analytics help you identify weak areas and measure improvement over time.

Accuracy trends over 7 days, 30 days, or all time
Category breakdowns: hard totals, soft totals, pairs, doubles, surrenders
Session history with hands played, accuracy, and mistake summaries
Achievement badges for milestones and streaks

REFERENCE ANYTIME
Access the full basic strategy chart whenever you need it — during lessons, practice sessions, or standalone review.

Color-coded strategy chart for your configured rules
Tap any chart cell for an explanation of the recommended play
Glossary of key blackjack terms

IMPORTANT: This app is an educational tool only. It does not involve real money and does not guarantee results. Basic strategy reduces the house edge but does not eliminate it.

Free to start. Module 1 is included at no cost. Unlock decision practice, the full curriculum and advanced stats with Premium.

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/