# Black Jack!! vs Deck 21

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.

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

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.

## The numbers

| Metric | Black Jack!! | Deck 21 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Daily** |
| Size | 29 MB | 74 MB |
| Requires iOS | 13.3 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [yuya kanbetsunawa](https://appshunter.io/developer/1597026161) | [Andre Salvador](https://appshunter.io/developer/1584863518) |

## What reviewers say

### Black Jack!!

[App page](https://appshunter.io/ios/app/black-jack/id6474468571)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Deck 21

[App page](https://appshunter.io/ios/app/deck-21/id6743880049)

**Features:** macOS Compatibility

**In-app purchases:** none


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