Comparison

Blackjack Flash vs Kon21

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

Head to head
About

Blackjack Flash

Experience the thrill of Vegas-style Blackjack optimized for your Apple Watch. Enjoy fast-paced rounds with authentic rules, customizable visuals, and intuitive controls. Unlock premium features for unlimited hands and advanced stats.

Highlights
  • Authentic Blackjack rules
  • Instant gameplay
  • Customizable premium visuals
  • Built exclusively for Apple Watch
  • Tap-to-play functionality
  • In-game shop for customization
  • Multi-language support
Features
Read full description

Step into the excitement of Las Vegas Blackjack — now on both iPhone and Apple Watch! Blackjack Flash delivers an authentic, high-speed casino experience wherever you are: full-screen on your iPhone or right from your wrist. Whether you're on a break, commuting, or simply craving a quick adrenaline rush, Blackjack Flash makes every moment feel like you're seated at a Vegas table. VEGAS CASINO IN YOUR POCKET AND ON YOUR WRIST • Authentic Blackjack Rules: Hit, Stand, Double Down, Split, and Insurance. • Instant Gameplay: Lightning-fast rounds perfect for quick sessions. • Customizable Premium Visuals: Choose your table themes, card backs, card faces, and animations. • Designed for iPhone and Apple Watch: Native controls on both — tap and swipe your way to 21. • iCloud Sync: Your stats, achievements, and shop unlocks follow you across your devices. NEW: GAME CENTER • 65 Achievements: From your first hand to legendary feats like Lucky Sevens. • Leaderboards: Compete globally for Most Wins, Best Win Streak, and Total Blackjacks. FLASH FEATURES FOR FAST FUN • Tap-to-Play: Start playing in seconds • Coins: Earn coins to spend in an in-game shop to customize your experience • Multi-Language Support WHO LOVES BLACKJACK FLASH? • iPhone and Apple Watch players • Card game lovers • Busy professionals seeking quick entertainment • Casual Blackjack players • Players who appreciate premium quality and intuitive design • Anyone craving Blackjack thrills, anytime, anywhere UNLOCK THE FULL VEGAS EXPERIENCE (Premium Upgrade) • Unlimited Hands • Achievement Coin Rewards: Earn coins from all 65 achievements. • Full Shop Access: Use your coins to personalize your game experience completely. • Advanced Stats: Dive deep into detailed statistics tracking wins, losses, and more!

About

Kon21

Embark on a cosmic adventure to restore balance to chaotic zodiac realms. Battle evolving creatures using a unique blackjack-inspired card system and master the art of 21 to unleash powerful attacks. Explore pixel-crafted worlds with a retro aesthetic.

Highlights
  • Explore living zodiac realms
  • Conway-powered evolving creatures
  • Strategic blackjack-inspired combat
  • Master the art of 21
  • Retro pixel aesthetic
Features
Read full description

KON21: THE ZODIAC WARRIOR A long time ago, across distant constellations, the zodiac realms fell into chaos. Ancient creatures now roam the stars — their forms evolving, shifting, and living through the mysterious patterns of Conway’s Game of Life. Only one warrior can restore balance. Will you master the sacred art of 21? --- EXPLORE LIVING WORLDS Traverse pixel-crafted zodiac realms filled with dynamic, evolving creatures. No two encounters are ever the same. CONWAY-POWERED CREATURES Enemies are alive. Their patterns shift, grow, and change based on cellular automata mechanics inspired by Conway’s Game of Life. STRATEGIC CARD BATTLES Engage in unique blackjack-inspired combat. Push your luck, outplay your opponent, and strike at the perfect moment. MASTER THE ART OF 21 Balance risk and reward as you build your hand and unleash powerful attacks tied to zodiac energy. RETRO PIXEL AESTHETIC A nostalgic visual experience with modern gameplay depth. Clean, minimal, and designed for immersive play. --- Will you conquer the zodiac realms… or be consumed by the chaos? Download KON21 and begin your journey.

Screenshots

Blackjack Flash4 screens
Kon213 screens

Verdict

The call

The clearest difference is in-app purchases: Kon21 at none against Blackjack Flash's 3. Blackjack Flash's advantage is iOS requirement (18.0 vs 26.2). On price, rating, ratings volume and update cadence 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. Blackjack Flash sells 3 one-off in-app purchases. Kon21 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 Blackjack Flash against 5.0 for Kon21. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

UpkeepUpdate frequency

Blackjack Flash ships an update every 5 days, Kon21 every 4 days. The most recent releases landed on September 29, 2026 and October 7, 2026 respectively.

Scorecard3 real differences · 6 level
Blackjack Flash versus Kon21: the parameters behind the verdict, then further details
ParameterBlackjack FlashKon21
PriceFreeFree
Rating5.0 (1 ratings)5.0 (1 ratings)
Number of ratings11
Update frequencyEvery 5 daysEvery 4 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, Apple WatchiPhone, iPad, Apple Watch — better
Requires iOS18.0 — better26.2
Further details — not scored
Size108 MB19 MB
Age rating4+4+
DeveloperNIKOLAH LOUIS DANCHUK-LAUZONRetroApps LLC

Customer experience

Blackjack Flash

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Kon21

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

Blackjack Flash

One-time3
  • Premium Access$0.99
  • Premium Plus$1.99
  • 100,000 Coins$1.99
None

Kon21

No in-app purchases

Questions

Is Blackjack Flash free?
Blackjack Flash is free to download, with in-app purchases available.
Is Kon21 free?
Kon21 is free to download, with no in-app purchases.
Which has better reviews, Blackjack Flash or Kon21?
Blackjack Flash and Kon21 are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.
Do Blackjack Flash or Kon21 have ads?
Neither Blackjack Flash nor Kon21 shows ads.
Which is updated more often, Blackjack Flash or Kon21?
Blackjack Flash ships an update every 5 days, and Kon21 every 4 days. Most recently, Blackjack Flash was updated on September 29, 2026 and Kon21 on October 7, 2026.

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