# 橡樹學苑 vs Ogden 850

The clearest difference is in-app purchases: 橡樹學苑 at none against Ogden 850's 2. Ogden 850's advantage is update cadence (every 3 weeks vs every 32 months) and device support. On price and iOS requirement there is nothing between them.

Both are free to download. Ogden 850 sells 2 in-app purchases, starting at $0.99 per month. 橡樹學苑 asks for nothing beyond the download.

橡樹學苑 ships an update every 32 months, Ogden 850 every 3 weeks. Both last shipped on October 24, 2026.

## The numbers

| Metric | 橡樹學苑 | Ogden 850 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | Every 32 months | **Every 3 weeks** |
| Size | 196 MB | 804 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | — | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Chi Hsien Lai](https://appshunter.io/developer/1039759515) | [小琦 王](https://appshunter.io/developer/1894109384) |

## What reviewers say

### 橡樹學苑

[App page](https://appshunter.io/ios/app/id6478760505)

**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 橡樹學苑 free?

橡樹學苑 is free to download, with no in-app purchases.

### Is Ogden 850 free?

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

### Which is updated more often, 橡樹學苑 or Ogden 850?

橡樹學苑 ships an update every 32 months, and Ogden 850 every 3 weeks. Most recently, 橡樹學苑 was updated on October 24, 2026 and Ogden 850 on October 24, 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.*