# SEES HD vs 关键词教育

The clearest difference is device support: 关键词教育 at 3 against SEES HD's 1. SEES HD's advantage is iOS requirement (9.0 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.

SEES HD ships an update every 6 weeks, 关键词教育 every 2 months. The most recent releases landed on October 4, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | SEES HD | 关键词教育 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Size | 284 MB | 60 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Action Blue Sky Education Information Technology Development Co., Ltd.](https://appshunter.io/developer/1272526236) | [前海乔希 (深圳)教育科技有限公司](https://appshunter.io/developer/1384365073) |

## What reviewers say

### SEES HD

[App page](https://appshunter.io/ios/app/sees-hd/id1272526237)

**In-app purchases:** none


### 关键词教育

[App page](https://appshunter.io/ios/app/id1551801302)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is SEES HD free?

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

### Is 关键词教育 free?

关键词教育 is free to download, with no in-app purchases.

### Do SEES HD or 关键词教育 have ads?

Neither SEES HD nor 关键词教育 shows ads.

### Which is updated more often, SEES HD or 关键词教育?

SEES HD ships an update every 6 weeks, and 关键词教育 every 2 months. Most recently, SEES HD was updated on October 4, 2026 and 关键词教育 on October 5, 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.*