# 日本産科婦人科学会 公式アプリ「JSOG」 vs Neg Multiply

The clearest difference is ads: 日本産科婦人科学会 公式アプリ「JSOG」 at none against Neg Multiply's shown. Neg Multiply's advantage is update cadence (every 5 weeks vs every 11 months). 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.

日本産科婦人科学会 公式アプリ「JSOG」 ships an update every 11 months, Neg Multiply every 5 weeks. The most recent releases landed on September 18, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | 日本産科婦人科学会 公式アプリ「JSOG」 | Neg Multiply |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 11 months | **Every 5 weeks** |
| Size | 8 MB | 32 MB |
| Requires iOS | **16.0** | 16.6 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Japan Society of Obstetrics and Gynecology](https://appshunter.io/developer/1362422765) | [Katsuhiko Yao](https://appshunter.io/developer/1543188534) |

## What reviewers say

### 日本産科婦人科学会 公式アプリ「JSOG」

[App page](https://appshunter.io/ios/app/jsog/id1362422766)

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

**In-app purchases:** none


### Neg Multiply

[App page](https://appshunter.io/ios/app/neg-multiply-brain-training/id6450744705)

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

**In-app purchases:** none


## Frequently asked questions

### Is 日本産科婦人科学会 公式アプリ「JSOG」 free?

日本産科婦人科学会 公式アプリ「JSOG」 is free to download, with no in-app purchases.

### Is Neg Multiply free?

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

### Do 日本産科婦人科学会 公式アプリ「JSOG」 or Neg Multiply have ads?

Neg Multiply shows ads; 日本産科婦人科学会 公式アプリ「JSOG」 does not.

### Which is updated more often, 日本産科婦人科学会 公式アプリ「JSOG」 or Neg Multiply?

日本産科婦人科学会 公式アプリ「JSOG」 ships an update every 11 months, and Neg Multiply every 5 weeks. Most recently, 日本産科婦人科学会 公式アプリ「JSOG」 was updated on September 18, 2026 and Neg Multiply on September 8, 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.*