# ShadowingGO vs 英単語990

The clearest difference is in-app purchases: 英単語990 at none against ShadowingGO's 2. ShadowingGO's advantage is update cadence (every 4 days vs every 2 weeks) and iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. ShadowingGO sells 2 in-app purchases, starting at $12.99 per month. 英単語990 asks for nothing beyond the download.

ShadowingGO ships an update every 4 days, 英単語990 every 2 weeks. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | ShadowingGO | 英単語990 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 2 weeks |
| Size | 90 MB | 6 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [DAISUKE HORII](https://appshunter.io/developer/1688856161) | [SANWA Inc.](https://appshunter.io/developer/1878028373) |

## What reviewers say

### ShadowingGO

[App page](https://appshunter.io/ios/app/shadowinggo/id6754666943)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basic Plan | $12.99 | per month |
| Basic Plan | $99.99 | per year |


### 英単語990

[App page](https://appshunter.io/ios/app/990/id6760735533)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ShadowingGO free?

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

### Is 英単語990 free?

英単語990 is free to download, with no in-app purchases.

### Do ShadowingGO or 英単語990 have ads?

Neither ShadowingGO nor 英単語990 shows ads.

### Which is updated more often, ShadowingGO or 英単語990?

ShadowingGO ships an update every 4 days, and 英単語990 every 2 weeks. Most recently, ShadowingGO was updated on October 30, 2026 and 英単語990 on October 31, 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.*