# Plain850：核心英文 850詞 vs Ogden 850

The clearest difference is in-app purchases: Plain850：核心英文 850詞 at none against Ogden 850's 2. Plain850：核心英文 850詞 also leads on iOS requirement (13.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Ogden 850 sells 2 in-app purchases, starting at $0.99 per month. Plain850：核心英文 850詞 asks for nothing beyond the download.

Plain850：核心英文 850詞 ships an update every 2 weeks, Ogden 850 every 3 weeks. The most recent releases landed on October 9, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Plain850：核心英文 850詞 | Ogden 850 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Size | 43 MB | 804 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Lok Wai](https://appshunter.io/developer/1895320924) | [小琦 王](https://appshunter.io/developer/1894109384) |

## What reviewers say

### Plain850：核心英文 850詞

[App page](https://appshunter.io/ios/app/plain850-850/id6776902920)

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

**In-app purchases:** none


### Ogden 850

[App page](https://appshunter.io/ios/app/ogden-850-basic-english/id6800209525)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AI Writing Monthly | $0.99 | per month |
| Kay Support | $1.99 | per month |


## Frequently asked questions

### Is Plain850：核心英文 850詞 free?

Plain850：核心英文 850詞 is free to download, with no in-app purchases.

### Is Ogden 850 free?

Ogden 850 is free to download, with in-app purchases available.

### Do Plain850：核心英文 850詞 or Ogden 850 have ads?

Neither Plain850：核心英文 850詞 nor Ogden 850 shows ads.

### Which is updated more often, Plain850：核心英文 850詞 or Ogden 850?

Plain850：核心英文 850詞 ships an update every 2 weeks, and Ogden 850 every 3 weeks. Most recently, Plain850：核心英文 850詞 was updated on October 9, 2026 and Ogden 850 on October 10, 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.*