# Blackjack 21: Play & Master — Strategy & Counting Trainer > Blackjack simulator for strategy and card counting training. (iPhone/iPad app by Olpik LLC.) - Source: https://appshunter.io/ios/app/blackjack-21-play-and-master/id6764669463 (this page in markdown: same URL + `.md`) - Developer: [Olpik LLC](https://appshunter.io/developer/1895872000) - Category: Games, Card - Price: Free with in-app purchases - Rating: 5.00/5 from 2 App Store ratings · 1 written reviews indexed - Age rating: 17+ - Requires: iOS 16.4 · 56 MB - Languages: American English - Released: 2026-09-11 - Data updated: 2026-10-16 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/blackjack-21-play-and-master/id6764669463/reviews.md ## What is Blackjack 21? Play blackjack. Learn the decisions. Train the count. Blackjack 21 combines a clean, fully playable card game with practical tools for learning basic strategy and card counting. There are no ads and no account is required. PLAY YOUR WAY • Choose 1, 2, 4, 6, or 8 decks • Set dealer soft 17, double after split, resplitting, late surrender, and shuffle depth • Practice split, double, surrender, and insurance decisions • Review hand history with every decision graded: what you played and what strategy recommends • Track your performance and strategy accuracy • Light and dark themes, plus a four-color deck for easier reading • Made for iPhone and iPad LEARN BASIC STRATEGY • Use strategy charts matched to your selected rules • Drill hard totals, soft totals, pairs, or mixed hands • Focused practice saves the hands you miss and brings them back until you get them right three times in a row • Get immediate feedback with concise probability-based explanations • Your training progress is saved between sessions • Learn eight card-counting systems (Hi-Lo, KO, Hi-Opt I and II, Omega II, Red 7, Zen Count, and Wong Halves) plus practical bankroll fundamentals GO FURTHER WITH PRO One optional lifetime Pro purchase unlocks: • Live running and true counts for all eight systems, with Show, Hide, or Quiz me modes • Strategy basis: play and grade by basic strategy or count-adjusted strategy, with index-deviation and insurance guidance • Bet suggestions from preset or custom bet ramps • Speed count, Deck countdown, Deviations, and Bet ramp drills • Bankroll calculator PRIVACY AND ACCESS • No advertising or cross-app tracking • No account or sign-in • Core gameplay and training work offline • Optional anonymous usage data helps us see which features are useful. It is on by default and you can turn it off anytime in Settings • Optional bug reports and automatic crash diagnostics help us improve reliability Blackjack 21 simulates casino card play for entertainment and training only. It does not offer real-money gambling, prizes, wagering, or cash-out. ## Key features - Playable blackjack game - Basic strategy trainer - Eight card-counting systems - Performance tracking - Customizable game rules - Offline gameplay - Light and dark themes ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Blackjack 21 Pro | $4.99 | one-time | ## Is Blackjack 21 safe? Not enough ratings yet to assess Blackjack 21. ## Is Blackjack 21 legit? Blackjack 21: Play & Master has limited verification signals. The AppsHunter Legitimacy Score for Blackjack 21 is 58 out of 100 points across 7 verification signals from App Store and developer data. ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/blackjack-21-play-and-master/id6764669463/reviews.md ### 5/5 — Great for practicing *2026-09-14* I've been using this to practice blackjack, and it’s actually really helpful. It’s easy to use and a good way to learn basic strategy without overthinking it. ## Frequently asked questions about Blackjack 21 ### Does Blackjack 21 have ads? No, Blackjack 21 is ad-free and does not feature any advertisements or cross-app tracking. ### Can I play Blackjack 21 offline? Yes, the core gameplay and training features of Blackjack 21 work offline, making it accessible without an internet connection. ### What are the Pro features in Blackjack 21? The optional Pro purchase unlocks live running and true counts, strategy basis options (basic or count-adjusted), bet suggestions, speed count, and a bankroll calculator. ### How does Blackjack 21 help me learn card counting? Blackjack 21 offers training for eight different card-counting systems, including Hi-Lo and Zen Count, with modes to show, hide, or quiz you on the counts. ### What is the age rating for Blackjack 21? Blackjack 21 has an age rating of 17+, which is typical for games simulating casino activities. ### How often is Blackjack 21 updated? The app was last updated on October 7, 2026, indicating ongoing support and potential for future improvements. ### Does Blackjack 21 offer real money gambling? No, Blackjack 21 simulates casino card play for entertainment and training purposes only. It does not offer real-money gambling, prizes, or wagering. ### What devices are supported by Blackjack 21? Blackjack 21 is made for iPhone and iPad, offering a compatible experience across Apple mobile devices. ## Version history (last 2 releases) ### 1.2.0 — 2026-10-07 NEW • Focused practice: every Basic strategy miss is saved, so you can drill just your weak spots. Three correct answers in a row clears a situation. • Hand history shows each decision: what you played, what strategy recommends, and whether it was right. Tap an accuracy row in Stats to see the hands behind it. • New Strategy basis setting: Basic strategy or Count-adjusted. It controls both your hints and how your decisions are graded. • Bet suggestions can now follow your custom bet ramp. • Support the developer: an optional tip in Settings. Tips never unlock features. • Share anonymous usage data is optional and easy to turn off in Settings → Privacy. SETTINGS & NAVIGATION • Settings is reorganized to simplify access to most popular settings: • Card counting lives in one place with a single mode: Off, Show count, Hide count or Quiz me. TRAINING • Count entry uses clear + and − buttons. • Learn articles and drill explanations now have bold highlights and tappable links to related screens. • Speed count pauses its timers while you confirm ending a drill. • Bet ramp keeps your session when you open the strategy chart or switch tabs. Results now read "TC ≥ +5", and expected units are correct for custom ramps. FIXES • Insurance works correctly on a $1 bet (it costs $0.50). • Surrender returns exactly half your bet: $5 gives back $2.50, not $2. • The dealer's hole card is now counted when the dealer stands on two cards. • The count resets correctly when a hand crosses the cut card, with the shuffle notice and sound. • Mixed ten-value hands like K + 10 open Hard 20 in the strategy chart instead of Pairs. • And more! Also: improved layouts for small phones, iPad and other large screens. ### 1.0.0 — 2026-09-11 No release notes. ## Apps similar to Blackjack 21 | App | Rating | Price | Category | | --- | --- | --- | --- | | [Blackjack Trainer: TwentyOne](https://appshunter.io/ios/app/blackjack-trainer-twentyone/id6760004532) | 5.0 (1) | Free | Games | | [Blackjack with Odds](https://appshunter.io/ios/app/blackjack-with-odds/id6470506973) | 4.8 (36) | Free | Games | | [Blackjack Strategy Trainer 21](https://appshunter.io/ios/app/blackjack-strategy-trainer-21/id6773344208) | — | Free | Games | | [All In: Blackjack](https://appshunter.io/ios/app/all-in-blackjack/id6748306827) | — | Free | Games | | [Blackjack Royale](https://appshunter.io/ios/app/blackjack-royale/id1118291013) | 4.3 (254) | Free | Games | | [Blackjack Masters - 21 Trainer](https://appshunter.io/ios/app/blackjack-masters-21-trainer/id1482780331) | 4.4 (297) | Free | Games | ## Related topics [21 play](https://appshunter.io/ios/topics/21-play) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-16.*