Comparison

Deck 21 vs SimpleJack 21

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

Head to head
About

Deck 21

Features
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"Deck 21" is a strategic reimagining of the classic blackjack, featuring a new mechanic that transforms each round into a dynamic challenge. In addition to the traditional rules of trying to reach 21 points without going over, cards have special abilities that can increase or decrease their value, changing the course of the game at any time. This mechanic adds a layer of strategy and unpredictability, making every decision crucial. Players will need to think beyond the basics, considering not only the cards they have, but also the effects they can activate to influence the outcome. With intuitive and dynamic gameplay, "Deck 21" promises an immersive experience for those looking for an innovative and challenging card game. In addition to the single-player mode, "Deck 21" features competitive multiplayer, allowing players to challenge their friends in strategic matches and compete to see who can master the card variations and emerge victorious. With intuitive and dynamic gameplay, "Deck 21" promises an immersive experience for those looking for an innovative and challenging card game.

About

SimpleJack 21

Practice your blackjack strategy with a modern, minimalist simulator. Enjoy realistic gameplay, offline play, and unlockable customizations. Perfect for beginners and experts alike to hone their card skills.

Highlights
  • Offline gameplay
  • Realistic 6-deck system
  • Progression and customization
  • Cryptographic RNG for fair play
  • Minimalist design
Features
Read full description

SimpleJack 21: Modern Card Game Experience Experience the timeless strategy of blackjack with a modern, minimalist twist. SimpleJack 21 is a premium simulator designed for those who appreciate clean design and authentic table gameplay. Whether you are a beginner looking for a trainer to learn the ropes, or an expert sharpening your card skills, SimpleJack 21 offers a polished environment to practice your strategy and have fun. Why Choose SimpleJack 21? • Play Offline with Remove Ads: Offline play is included with the Remove Ads in-app purchase, so you can hone your strategy without an internet connection, wherever you go. • Pure Strategy: Enjoy a realistic simulation using a standard 6-deck system and professional dealer rules. Perfect your timing on when to hit, stand, or double down. • Progression & Customization: Unlock unique table themes and beautiful card designs as you advance. Personalize your experience with a variety of modern, minimalist aesthetics. • Fair Play: Every hand is dealt using a cryptographic random number generator for a truly unpredictable and authentic experience. How to Play: The goal is simple: beat the dealer by getting a hand value as close to 21 as possible without going over. Use your skills to decide the best mathematical move in every scenario. Disclaimer: SimpleJack 21 is a simulation intended for an adult audience (18+) for entertainment purposes only. This app does not offer real money gambling, wagering, or the opportunity to win real money or physical prizes. All in-game currency is strictly virtual and has no real-world monetary value. Practice or success at social simulation gaming does not imply future success at real money gambling. For more information, please visit our legal pages: Privacy Policy: https://firstpoint.com.tr/sj/ios/privacy-policy.html Terms of Service: https://firstpoint.com.tr/sj/ios/terms-and-conditions.html

Screenshots

Deck 213 screens
SimpleJack 214 screens

Verdict

The call

The clearest difference is in-app purchases: Deck 21 at none against SimpleJack 21's 10. Deck 21 also leads on ads (none vs shown) and update cadence (daily vs fortnightly). On price 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. SimpleJack 21 sells 10 one-off in-app purchases. Deck 21 asks for nothing beyond the download.

UpkeepUpdate frequency

Deck 21 ships an update daily, SimpleJack 21 fortnightly. Both last shipped on October 28, 2026.

Scorecard4 real differences · 5 level
Deck 21 versus SimpleJack 21: the parameters behind the verdict, then further details
ParameterDeck 21SimpleJack 21
PriceFreeFree
Rating—4.2 (6 ratings) — better
Number of ratings—6 — better
Update frequencyDaily — betterFortnightly
AdsNo — betterYes
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.1
Further details — not scored
Size74 MB47 MB
Age rating4++17
DeveloperAndre SalvadorFIRST POINT YAZILIM LIMITED SIRKETI

In-app purchases

None

Deck 21

No in-app purchases

10 purchases

SimpleJack 21

One-time10
  • 5k Coins$0.99
  • Welcome Pack$1.99
  • 18k Coins$2.99
Show 7 more
  • Remove Ads$3.99
  • Welcome Pack Pro$4.99
  • 65k Coins$6.99
  • Summer Play Pass$9.99
  • 225k Coins$14.99
  • 750k Coins$29.99
  • 2.5m Coins$59.99

Questions

Is Deck 21 free?
Deck 21 is free to download, with no in-app purchases.
Is SimpleJack 21 free?
SimpleJack 21 is free to download, with in-app purchases available.
Do Deck 21 or SimpleJack 21 have ads?
SimpleJack 21 shows ads; Deck 21 does not.
Which is updated more often, Deck 21 or SimpleJack 21?
Deck 21 ships an update daily, and SimpleJack 21 fortnightly. Most recently, Deck 21 was updated on October 28, 2026 and SimpleJack 21 on October 28, 2026.

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