# 绘本树HD vs Plain850：核心英文 850詞

The clearest difference is device support: Plain850：核心英文 850詞 at 3 against 绘本树HD's 1. 绘本树HD's advantage is iOS requirement (10.0 vs 13.0). On price, update cadence, 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.

绘本树HD ships an update every 3 weeks, Plain850：核心英文 850詞 every 2 weeks. The most recent releases landed on October 26, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | 绘本树HD | Plain850：核心英文 850詞 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Size | 40 MB | 43 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Shanghai Storytree Education Technology Co.,Ltd](https://appshunter.io/developer/1037693017) | [Lok Wai](https://appshunter.io/developer/1895320924) |

## What reviewers say

### 绘本树HD

[App page](https://appshunter.io/ios/app/hd/id1189867987)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is 绘本树HD free?

绘本树HD is free to download, with no in-app purchases.

### 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.

### Do 绘本树HD or Plain850：核心英文 850詞 have ads?

Neither 绘本树HD nor Plain850：核心英文 850詞 shows ads.

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

绘本树HD ships an update every 3 weeks, and Plain850：核心英文 850詞 every 2 weeks. Most recently, 绘本树HD was updated on October 26, 2026 and Plain850：核心英文 850詞 on October 9, 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.*