# 21 Coach: Blackjack Strategy — Master Basic Strategy Offline > Master Basic Strategy Offline (iPhone/iPad app by Sahin Sakir Onder.) - Source: https://appshunter.io/ios/app/21-coach-blackjack-strategy/id6796373416 (this page in markdown: same URL + `.md`) - Developer: [Sahin Sakir Onder](https://appshunter.io/developer/6796373900) - Category: Games, Education - Price: Free - Age rating: 4+ - Requires: iOS 15.1 · 22 MB - Languages: American English - Released: 2026-08-05 - Data updated: 2026-10-25 ## What is 21 Coach? 21 Coach trains you to play perfect blackjack basic strategy — the mathematically optimal decision for every hand. This is a training tool, not a gambling app. There is no real money, no wagering, no simulated currency, and no in-app purchases. HOW IT WORKS You are dealt a hand against the dealer's up-card. Pick your action — Hit, Stand, Double, Split, Surrender or Insurance. If you're right, the hand plays out and a new one is dealt. If you're wrong, that button greys out and you try again, with a plain-language explanation of why the correct play is correct. You learn the reasoning, not just the answer. BUILT FOR YOUR TABLE Most trainers assume one fixed rule set. 21 Coach adapts to the table you actually play: • 1 to 8 decks • Dealer stands or hits soft 17 (S17 / H17) • Double on any, 9-11, 10-11, or never • Double after split (DAS) on or off • Surrender: never, late, early, or early except vs Ace • Dealer peek (US) or no peek (European) • Blackjack pays 3:2 or 6:5 Change any rule and the strategy card recalculates instantly — training and reference can never disagree. ONE-TAP PRESETS Vegas Strip, Vegas Downtown, Typical European, or your own custom table. FOCUSED PRACTICE • Modes: All hands, Soft hands, Pairs, or Custom • Custom mode: pick exactly which hands and which dealer up-cards to drill • Skill levels: Normal deals at random; Beginner, Intermediate and Advanced weight toward the tricky hands where basic strategy is easiest to get wrong TRACK YOUR WEAK SPOTS Hands played, guesses, errors, accuracy and streaks. A Frequent Errors list ranks the exact hands you get wrong most often — then drill just those in Custom mode. LIVE STRATEGY CARD Colour-coded hard, soft and pairs charts with your current hand highlighted. Full legend included. BUILT-IN GUIDE A Help section explains how blackjack works, what each action does, and what every house rule means for your odds. ALSO • English and Turkish • Works completely offline • No ads, no accounts, no tracking, no data collection • Your stats and settings stay on your device Whether you're preparing for a casino trip or just want to stop guessing at the table, 21 Coach gets you to perfect basic strategy. ## Is 21 Coach safe? Not enough ratings yet to assess 21 Coach. ## Is 21 Coach legit? 21 Coach: Blackjack Strategy has limited verification signals. The AppsHunter Legitimacy Score for 21 Coach is 58 out of 100 points across 7 verification signals from App Store and developer data. ## Version history (last 3 releases) ### 1.1.1 — 2026-08-31 Bug fixes and UI improvements: fixed a layout issue where feedback and hint messages could get hidden behind other screen elements on some devices. The hint now always shows the current hand first. Added a "tap to continue" option for the redeal delay. Other small stability improvements. ### 1.1.0 — 2026-08-19 New Help tab with a full guide to the rules, actions, and how basic strategy works. Sound and vibration feedback on right and wrong answers (both can be toggled off in Settings). Four card styles to choose from: Classic, Clear Sans, Vintage, and Minimal. Choose exactly which stats you want to see on the practice screen. Small performance and stability improvements. ### 1.0 — 2026-08-06 No release notes. ## Apps similar to 21 Coach | App | Rating | Price | Category | | --- | --- | --- | --- | | [Boring Offline Games](https://appshunter.io/ios/app/boring-offline-games/id6780210908) | — | Free | Games | | [Necro Hero](https://appshunter.io/ios/app/necro-hero/id6642698898) | 2.9 (7) | Free | Games | | [Roulette Casino](https://appshunter.io/ios/app/roulette-casino/id6470970952) | 3.7 (3) | Free | Games | | [Jacks or Better - Video Poker!](https://appshunter.io/ios/app/jacks-or-better-video-poker/id964095573) | 4.7 (501) | Free | Games | | [Millionaire Trivia: Quiz Game](https://appshunter.io/ios/app/millionaire-trivia-quiz-game/id6756216740) | 4.3 (7) | Free | Games | | [Dream Boyfriend Maker Dress Up](https://appshunter.io/ios/app/dream-boyfriend-maker-dress-up/id1453957055) | 4.2 (30) | Free | Games | --- *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 2026-10-25.*