Comparison

Black Jack!! vs Deck 21

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

Head to head
About

Black Jack!!

Features
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Enjoy Blackjack anytime, anywhere! This is a simple and stylish Blackjack card game. Just tap "Start" to deal your cards, flip them over to check your hand, and draw more cards to get as close to 21 as you can. When you're ready, tap "Fight" to reveal your total. Features: - Simple, intuitive controls anyone can enjoy - Beautiful card animations - Aces are automatically counted as 1 or 11 for you - Play as many rounds as you like, completely free Perfect for a quick break or killing some time. Try your luck and aim for 21!

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.

Screenshots

Black Jack!!4 screens
Deck 213 screens

Verdict

The call

The clearest difference is ads: Deck 21 at none against Black Jack!!'s shown. Deck 21 also leads on update cadence (daily vs every 3 weeks). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

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

UpkeepUpdate frequency

Black Jack!! ships an update every 3 weeks, Deck 21 daily. The most recent releases landed on September 2, 2026 and September 9, 2026 respectively.

Scorecard2 real differences ยท 4 level
Black Jack!! versus Deck 21: the parameters behind the verdict, then further details
ParameterBlack Jack!!Deck 21
PriceFreeFree
Update frequencyEvery 3 weeksDaily โ€” better
AdsYesNo โ€” better
In-app purchasesNoNo
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.312.0 โ€” better
Further details โ€” not scored
Size29 MB74 MB
Age rating4+4+
Developeryuya kanbetsunawaAndre Salvador

In-app purchases

None

Black Jack!!

No in-app purchases

None

Deck 21

No in-app purchases

Questions

Is Black Jack!! free?
Black Jack!! is free to download, with no in-app purchases.
Is Deck 21 free?
Deck 21 is free to download, with no in-app purchases.
Do Black Jack!! or Deck 21 have ads?
Black Jack!! shows ads; Deck 21 does not.
Which is updated more often, Black Jack!! or Deck 21?
Black Jack!! ships an update every 3 weeks, and Deck 21 daily. Most recently, Black Jack!! was updated on September 2, 2026 and Deck 21 on September 9, 2026.

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