# 空の青さを知る vs Nigiri Panic

The clearest difference is in-app purchases: 空の青さを知る at none against Nigiri Panic's 1. Nigiri Panic's advantage is update cadence (every 2 days vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Nigiri Panic sells 1 one-off in-app purchase. 空の青さを知る asks for nothing beyond the download.

空の青さを知る ships an update monthly, Nigiri Panic every 2 days. The most recent releases landed on October 25, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | 空の青さを知る | Nigiri Panic |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 days** |
| Size | 86 MB | 254 MB |
| Requires iOS | 15.5 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 9+ | 4+ |
| Developer | [chiaki matsuda](https://appshunter.io/developer/1602664460) | [Yosuke Yanamoto](https://appshunter.io/developer/1721292844) |

## What reviewers say

### 空の青さを知る

[App page](https://appshunter.io/ios/app/id1602664458)

**Features:** macOS Compatibility

**In-app purchases:** none


### Nigiri Panic

[App page](https://appshunter.io/ios/app/nigiri-panic-sushi-co-op/id6797676852)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Worlds | $4.99 | one-time |


## Frequently asked questions

### Is 空の青さを知る free?

空の青さを知る is free to download, with no in-app purchases.

### Is Nigiri Panic free?

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

### Do 空の青さを知る or Nigiri Panic have ads?

Neither 空の青さを知る nor Nigiri Panic shows ads.

### Which is updated more often, 空の青さを知る or Nigiri Panic?

空の青さを知る ships an update monthly, and Nigiri Panic every 2 days. Most recently, 空の青さを知る was updated on October 25, 2026 and Nigiri Panic on November 6, 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.*