# 五年级奥数HD vs PET单词速记

The clearest difference is update cadence: PET单词速记 at every 9 days against 五年级奥数HD's every 3 months. PET单词速记 also leads on device support (4 vs 1). 五年级奥数HD's advantage is iOS requirement (9.0 vs 15.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. 五年级奥数HD sells 10 one-off in-app purchases and PET单词速记 sells 2 in-app purchases, starting at $9.99 per year. Whichever you choose, the download price is not the number that matters.

五年级奥数HD ships an update every 3 months, PET单词速记 every 9 days. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | 五年级奥数HD | PET单词速记 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 9 days** |
| Size | 59 MB | 31 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [志军 王](https://appshunter.io/developer/842570665) | [天津麦金塔科技有限公司](https://appshunter.io/developer/1221143167) |

## What reviewers say

### 五年级奥数HD

[App page](https://appshunter.io/ios/app/hd/id953124351)

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 精选的50道题目(二) | $0.99 | one-time |
| 精选的50道题目(三) | $0.99 | one-time |
| 精选的50道题目(四) | $0.99 | one-time |
| 精选的50道题目(五) | $0.99 | one-time |
| 50道精选的题目(六) | $0.99 | one-time |
| 精选的50道题目(七) | $0.99 | one-time |
| 精选的50道题目(八) | $0.99 | one-time |
| 试卷生成功能 | $0.99 | one-time |
| 精选的50道题目(九) | $0.99 | one-time |
| 无限制全部功能 | $2.99 | one-time |


### PET单词速记

[App page](https://appshunter.io/ios/app/pet-meowords/id6737247519)

**Features:** Family Sharing, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PET单词速记-高级年费版 | $9.99 | per year |
| PET单词速记终身版 | $24.99 | one-time |


## Frequently asked questions

### Is 五年级奥数HD free?

五年级奥数HD is free to download, with in-app purchases available.

### Is PET单词速记 free?

PET单词速记 is free to download, with in-app purchases available.

### Do 五年级奥数HD or PET单词速记 have ads?

Neither 五年级奥数HD nor PET单词速记 shows ads.

### Which is updated more often, 五年级奥数HD or PET单词速记?

五年级奥数HD ships an update every 3 months, and PET单词速记 every 9 days. Most recently, 五年级奥数HD was updated on October 26, 2026 and PET单词速记 on October 27, 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.*