Comparison

Pick21 Solitaire 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

Pick21 Solitaire

This card game offers a unique twist on solitaire, challenging players to combine cards to reach 21. It's easy to pick up but offers engaging gameplay for both quick breaks and extended play sessions.

Highlights
  • Combine cards to hit 21
  • Fast-paced gameplay
  • High score system
  • Simple to learn
  • Suitable for short sessions
Features
Read full description

Pick21 Solitaire is a quick-thinking twist on classic solitaire. Combine cards to hit 21. The faster you go, the higher your score! Simple to learn, hard to put down, and perfect for short sessions or long runs.

About

Blackjack Strategy Trainer 21

Master blackjack with a strategy trainer that uses spaced repetition to adapt to your learning. Practice every hand decision with instant feedback and learn from structured lessons. Supports multiple rule sets for realistic casino training.

Highlights
  • Spaced repetition learning
  • Practice hit, stand, double, split, surrender
  • Supports S17, H17, and ENHC rule sets
  • Full basic strategy chart
  • Structured lessons for beginners
  • Realistic casino practice environment
  • Cloud sync across devices
Features
Read full description

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

Pick21 Solitaire1 screens
Blackjack Strategy Trainer 214 screens

Verdict

The call

The clearest difference is in-app purchases: Blackjack Strategy Trainer 21 at none against Pick21 Solitaire's 1. Blackjack Strategy Trainer 21 also leads on iOS requirement (15.0 vs 26.1). Pick21 Solitaire's advantage is ads (none vs shown) and update cadence (every 2 days vs weekly). On price, rating, ratings volume and device support 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. Pick21 Solitaire sells 1 one-off in-app purchase. Blackjack Strategy Trainer 21 asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Pick21 Solitaire against 5.0 for Blackjack Strategy Trainer 21. Both are backed by a comparable volume of ratings — 2 and 2 respectively.

UpkeepUpdate frequency

Pick21 Solitaire ships an update every 2 days, Blackjack Strategy Trainer 21 weekly. Both last shipped on November 5, 2026.

Scorecard5 real differences · 4 level
Pick21 Solitaire versus Blackjack Strategy Trainer 21: the parameters behind the verdict, then further details
ParameterPick21 SolitaireBlackjack Strategy Trainer 21
PriceFreeFree
Rating5.0 (2 ratings)5.0 (2 ratings)
Number of ratings22
Update frequencyEvery 2 days — betterWeekly
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree — betterAd-supported
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS26.115.0 — better
Further details — not scored
Size10 MB83 MB
Age rating4+4+
DeveloperGabriel KnuthCWTI Ltd

Customer experience

Pick21 Solitaire

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Blackjack Strategy Trainer 21

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Pick21 Solitaire

One-time1
  • Pick 21 Developer Tip$1.99
None

Blackjack Strategy Trainer 21

No in-app purchases

Questions

Is Pick21 Solitaire free?
Pick21 Solitaire is free to download, with in-app purchases available.
Is Blackjack Strategy Trainer 21 free?
Blackjack Strategy Trainer 21 is free to download, with no in-app purchases.
Which has better reviews, Pick21 Solitaire or Blackjack Strategy Trainer 21?
Pick21 Solitaire and Blackjack Strategy Trainer 21 are both rated 5.0 out of 5 on the App Store, from 2 and 2 ratings respectively.
Do Pick21 Solitaire or Blackjack Strategy Trainer 21 have ads?
Blackjack Strategy Trainer 21 shows ads; Pick21 Solitaire does not.
Which is updated more often, Pick21 Solitaire or Blackjack Strategy Trainer 21?
Pick21 Solitaire ships an update every 2 days, and Blackjack Strategy Trainer 21 weekly. Most recently, Pick21 Solitaire was updated on November 5, 2026 and Blackjack Strategy Trainer 21 on November 5, 2026.

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