Comparison

21 Trainer vs Blackjack Strategy Trainer 21

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

21 Trainer

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21 Trainer is a focused practice app for learning blackjack fundamentals and mastering the Hi-Lo counting system. Play hands in a clean table view, then switch to dedicated training and quick drills to build speed and accuracy. Features: - Play mode to practice real decision flow hand by hand. - Training mode for running and true count practice with optional quizzes. - Quick Drills with adjustable duration, auto-advance pace, mid-quizzes, and a final check. - Detailed statistics across play, training, and drills: hands played, win rate, counting accuracy, and decision time. - Customization for decks, themes, card styles, and quiz options. Whether you are new to counting or polishing your skills, 21 Trainer helps you practice deliberately and track your progress over time.

About

Blackjack Strategy Trainer 21

Master blackjack with a smart trainer that uses spaced repetition to focus on your weak hands. Practice all decisions across three rule sets with realistic casino-style gameplay. Learn the math behind every move and build confidence at the table.

Highlights
  • Spaced repetition learning
  • Three rule sets (S17, H17, ENHC)
  • Full strategy chart reference
  • Realistic casino practice table
  • Structured lessons for beginners
  • Cloud sync across devices
Features
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The house has a system. Do you? Stop guessing at the blackjack table. Blackjack Strategy Trainer 21 teaches you the mathematically correct play for every hand using proven spaced repetition techniques. Practice hit, stand, double, split, and surrender decisions with instant feedback. WHY THIS TRAINER IS DIFFERENT Unlike other blackjack apps, this trainer adapts to you. The spaced repetition system tracks which hands you get wrong and serves them more often, so you improve faster where it matters most. 3 RULE SETS FOR REAL TABLES Most blackjack trainers only support one rule set. This app supports three, so your training matches the exact table rules you may face: - S17: Dealer stands on soft 17 - H17: Dealer hits on soft 17 - ENHC: European No Hole Card FULL STRATEGY CHART Browse the complete basic strategy chart in a color-coded grid. See the correct play for every dealer upcard at a glance. Hard totals, soft totals, and pairs are all covered. SMART TRAINING FEATURES - Spaced repetition: hands you get wrong appear more often until you master them - Hand-type accuracy breakdown for hard totals, soft totals, pairs, and surrender decisions - Daily goals that grow as you play: 10 hands a day, then 25, then 50 - Daily streaks with Streak Shields to protect your progress - Auto-advance timer for rapid-fire practice sessions LEARN MODE Not sure where to start? Structured lessons cover basic strategy from the ground up. Each lesson includes clear rules and detailed explanations so you understand the reasoning behind every decision. CASINO-STYLE PRACTICE Train on an immersive green felt table with realistic playing cards. It feels closer to a real blackjack table than a boring quiz. AVAILABLE IN 8 LANGUAGES English, Korean, Italian, German, French, Spanish, Portuguese, and Romanian. CLOUD SYNC Create an account to sync your progress across devices. Switch phones without losing your stats, streaks, or shields. FREE TO PLAY Download and start training immediately. No subscription required. Perfect for casino beginners, experienced players refreshing before a trip, online blackjack players, and European players who need ENHC strategy. Reduce the house edge and play 21 with confidence.

Screenshots

21 Trainer4 screens
Blackjack Strategy Trainer 214 screens

Verdict

The call

The clearest difference is ads: 21 Trainer at none against Blackjack Strategy Trainer 21's shown. Blackjack Strategy Trainer 21's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 26.0). On price and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Scorecard3 real differences · 6 level
21 Trainer versus Blackjack Strategy Trainer 21: the parameters behind the verdict, then further details
Parameter21 TrainerBlackjack Strategy Trainer 21
PriceFreeFree
Rating—5.0 (2 ratings) — better
Number of ratings—2 — better
Update frequency—Every 8 days
AdsNo — betterYes
In-app purchasesNoNo
Monetization—Ad-supported
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS26.015.0 — better
Further details — not scored
Size4 MB83 MB
Age rating4+4+
DeveloperJan HaiderCWTI Ltd

In-app purchases

None

21 Trainer

No in-app purchases

None

Blackjack Strategy Trainer 21

No in-app purchases

Questions

Is 21 Trainer free?
21 Trainer is free to download, with no in-app purchases.
Is Blackjack Strategy Trainer 21 free?
Blackjack Strategy Trainer 21 is free to download, with no in-app purchases.
Do 21 Trainer or Blackjack Strategy Trainer 21 have ads?
Blackjack Strategy Trainer 21 shows ads; 21 Trainer does not.

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