# BLACK JACK PROBABILITY vs 優しい色合いのフラッシュ暗算

The clearest difference is ads: BLACK JACK PROBABILITY at none against 優しい色合いのフラッシュ暗算's shown. 優しい色合いのフラッシュ暗算's advantage is update cadence (every 3 weeks vs every 4 months). On in-app purchases, device support and iOS requirement there is nothing between them.

BLACK JACK PROBABILITY ships an update every 4 months, 優しい色合いのフラッシュ暗算 every 3 weeks. Both last shipped on November 3, 2026.

## The numbers

| Metric | BLACK JACK PROBABILITY | 優しい色合いのフラッシュ暗算 |
| --- | --- | --- |
| Price | — | **Free** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Size | 5 MB | 18 MB |
| Requires iOS | 16.0 | **15.3** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [MIAOU, KK](https://appshunter.io/developer/1547778886) | [Manae Ishida](https://appshunter.io/developer/1617075502) |

## What reviewers say

### BLACK JACK PROBABILITY

[App page](https://appshunter.io/ios/app/black-jack-probability/id1547778883)

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

**In-app purchases:** none


### 優しい色合いのフラッシュ暗算

[App page](https://appshunter.io/ios/app/id1617075500)

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

**In-app purchases:** none


## Frequently asked questions

### Is BLACK JACK PROBABILITY free?

Pricing for BLACK JACK PROBABILITY is not currently listed on the App Store.

### Is 優しい色合いのフラッシュ暗算 free?

優しい色合いのフラッシュ暗算 is free to download, with no in-app purchases.

### Do BLACK JACK PROBABILITY or 優しい色合いのフラッシュ暗算 have ads?

優しい色合いのフラッシュ暗算 shows ads; BLACK JACK PROBABILITY does not.

### Which is updated more often, BLACK JACK PROBABILITY or 優しい色合いのフラッシュ暗算?

BLACK JACK PROBABILITY ships an update every 4 months, and 優しい色合いのフラッシュ暗算 every 3 weeks. Most recently, BLACK JACK PROBABILITY was updated on November 3, 2026 and 優しい色合いのフラッシュ暗算 on November 3, 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.*