# BJackWatch vs Kon21

The clearest difference is in-app purchases: Kon21 at none against BJackWatch's 3. BJackWatch's advantage is update cadence (daily vs every 4 days) and iOS requirement (13.0 vs 26.2). On price, ads and device support there is nothing between them.

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

BJackWatch ships an update daily, Kon21 every 4 days. The most recent releases landed on October 25, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | BJackWatch | Kon21 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/kon21/id6760956783/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Daily** | Every 4 days |
| Monetization | — | Free |
| Size | 3 MB | 19 MB |
| Requires iOS | **13.0** | 26.2 |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, Apple Watch |
| Age rating | 17+ | 4+ |
| Developer | [Ceos Consulting](https://appshunter.io/developer/1849121672) | [RetroApps LLC](https://appshunter.io/developer/1845420719) |

## What reviewers say

### BJackWatch

[App page](https://appshunter.io/ios/app/bjackwatch/id6754934158)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1000 coins | $0.99 | one-time |
| 10k coins | $5.99 | one-time |
| 100k coins | $29.99 | 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 BJackWatch free?

BJackWatch is free to download, with in-app purchases available.

### Is Kon21 free?

Kon21 is free to download, with no in-app purchases.

### Do BJackWatch or Kon21 have ads?

Neither BJackWatch nor Kon21 shows ads.

### Which is updated more often, BJackWatch or Kon21?

BJackWatch ships an update daily, and Kon21 every 4 days. Most recently, BJackWatch was updated on October 25, 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.*