# EmboRatio vs 脳観

The clearest difference is update cadence: 脳観 at monthly against EmboRatio's every 4 months. 脳観 also leads on iOS requirement (10.0 vs 15.4). On price, review sentiment, ads and in-app purchases there is nothing between them.

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

EmboRatio ships an update every 4 months, 脳観 monthly. The most recent releases landed on October 26, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | EmboRatio | 脳観 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/id1518722112/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Monthly** |
| Monetization | Free | — |
| Size | 1 MB | 272 MB |
| Requires iOS | 15.4 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Masaaki Hirata](https://appshunter.io/developer/942972055) | [Satoshi Kiyofuji](https://appshunter.io/developer/1518722111) |

## What reviewers say

### EmboRatio

[App page](https://appshunter.io/ios/app/emboratio/id1204239972)

Calculate the necessary coil length for aneurysm embolization. This tool also computes the current embolic rate and lists available coils in Japan.

**Highlights:** Coil length calculation for aneurysms, Embolic rate calculation, List of available coils in Japan, Medical calculation tool

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

**In-app purchases:** none


### 脳観

[App page](https://appshunter.io/ios/app/id1518722112)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is EmboRatio free?

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

### Is 脳観 free?

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

### Do EmboRatio or 脳観 have ads?

Neither EmboRatio nor 脳観 shows ads.

### Which is updated more often, EmboRatio or 脳観?

EmboRatio ships an update every 4 months, and 脳観 monthly. Most recently, EmboRatio was updated on October 26, 2026 and 脳観 on October 11, 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.*