Blackjack Trainer: 21 Coach
Basic Strategy & Speed Math
Free · Designed for iPad. Not verified for macOS.
Practice basic strategy with instant feedback, play the Daily challenge, build a day streak, or race the clock in Speed Math. Free, offline, no ads, no sign-up.
Blackjack Trainer teaches you the mathematically correct way to play blackjack, one hand at a time.
Every recommendation in this app is basic strategy: the provably optimal play for every hand, verified against a reference expected-value engine, not gut feel or folklore. Play practice hands at a first-person table with a dealer, get instant feedback the moment you act, and learn exactly why a play is right or wrong in plain English.
NEW IN 1.2
- Daily challenge: the same ten hands for everyone, one attempt a day, with a result to share
- Day streak with a daily goal and one free rest day a week
- A 14-day path through every lesson and drill
- Share your streak and progress as a card to Instagram, TikTok, and more
- Optional practice reminders, off until you turn them on
- Cards dealt one at a time in real dealer order, with animated hand signals
WHY BASIC STRATEGY
Basic strategy is the set of mathematically optimal decisions for every blackjack hand, worked out through exhaustive computer analysis of the game's probabilities. Playing it perfectly doesn't guarantee any single hand goes your way, but it is the mathematically strongest way to play, every single hand. This app exists to help that strategy become second nature, through repetition and clear explanations, so you can play with confidence.
RULE-AWARE, NOT ONE-SIZE-FITS-ALL
Correct blackjack strategy changes with the table rules, and this app adapts to match:
- Dealer hits or stands on soft 17 (H17 / S17)
- 1, 2, 4, 6, or 8 deck shoes
Change either one in Settings and every recommendation updates to match, because the correct play for a 16 against a dealer's 10 is not the same at every table. The charts assume double after split and late surrender are allowed.
LEARN BY PLAYING
- A living practice table with a dealer, a real deck of cards, and subtle table motion that makes practice feel real
- Instant feedback after every decision, with a plain-English explanation of why a play is correct or incorrect
- Short "Remember" mnemonic cards that reinforce the pattern behind a decision, not just the answer
- A full basic strategy Chart tab you can flip through any time, color-coded and organized by hard totals, soft totals, and pairs
- A Learn tab with lessons and drill packs targeted at your weakest spots, built from your own mistakes and lowest-mastery cells
- A Progress tab with an accuracy ring, a day streak, a trend sparkline, and a mastery heatmap across every hand and dealer upcard
COUNT: HI-LO SKILL TRAINING
The Count tab trains the Hi-Lo running count and the true count on cards the app deals. Learn how each card is tagged, how to keep a running count, and how to convert it to a true count, then see how the count behaves at single deck, double deck, and shoe tables. Three drills: card by card, a timed deck countdown, and true count conversion. It is a practice drill only, with no card entry from a live table.
SPEED MATH
Add up a hand before the clock runs out. Two modes, Total and Make 21, a timer you can set to 3, 5, or 10 seconds or turn off, and an ace that counts as 1 or 11. Fast, accurate arithmetic is the foundation for everything else.
EDUCATION, NOT GAMBLING
This is a study tool, not a gambling app. There is no real money and no virtual currency. There are no chips, no bets, no bankroll, and no payouts: nothing is staked, and nothing is won or lost. You practice decisions and the app grades them, exactly the way a chess tactics trainer grades moves.
PRIVATE BY DESIGN
Blackjack Trainer works completely offline. There's no account, no sign-up, and no internet connection required. Your progress is stored only on your device. There are no ads, no in-app purchases, no analytics, and no third-party tracking of any kind.
Whether you're brushing up before a friendly game, getting ready for a trip, or just curious what the "correct" play actually is, Blackjack Trainer turns basic strategy from a chart you memorize into a skill you actually build.
Fairer feedback and a cleaner review list.
Made the best play and still lost the hand? The trainer now tells you it was the right call, not an error.
Practice replays of missed spots now grade only your first decision, so your progress stays accurate.
Your review list keeps one entry per situation, so the same spot no longer piles up.
The developer, Aditya Appana, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Aditya Appana
- Size
- 48.4 MB
- Category
- Education
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - iPad
Requires iPadOS 16.4 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Aditya Pisupati