# Blackjack Flash vs Kon21

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.

Both are free to download. Blackjack Flash sells 3 one-off in-app purchases. Kon21 asks for nothing beyond the download.

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.

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.

## The numbers

| Metric | Blackjack Flash | Kon21 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/blackjack-flash/id6748754932/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/kon21/id6760956783/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 days | **Every 4 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 108 MB | 19 MB |
| Requires iOS | **18.0** | 26.2 |
| Devices | iPhone, Apple Watch | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [NIKOLAH LOUIS DANCHUK-LAUZON](https://appshunter.io/developer/1793637444) | [RetroApps LLC](https://appshunter.io/developer/1845420719) |

## What reviewers say

### Blackjack Flash

[App page](https://appshunter.io/ios/app/blackjack-flash/id6748754932)

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:** Apple Watch app

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Access | $0.99 | one-time |
| Premium Plus | $1.99 | one-time |
| 100,000 Coins | $1.99 | one-time |


### Kon21

[App page](https://appshunter.io/ios/app/kon21/id6760956783)

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:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*