# AI错题树 vs 大学搜题

The clearest difference is update cadence: 大学搜题 at every 3 days against AI错题树's weekly. 大学搜题 also leads on iOS requirement (13.0 vs 16.4). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. AI错题树 sells 3 one-off in-app purchases and 大学搜题 sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

AI错题树 ships an update weekly, 大学搜题 every 3 days. The most recent releases landed on October 31, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | AI错题树 | 大学搜题 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ai/id6771737023/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 48 MB | 8 MB |
| Requires iOS | 16.4 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [南京五脉生物科技有限公司](https://appshunter.io/developer/6771737025) | [坤 杨](https://appshunter.io/developer/1838503045) |

## What reviewers say

### AI错题树

[App page](https://appshunter.io/ios/app/ai/id6771737023)

Effortlessly capture and analyze your mistakes from tests and homework using AI. Organize errors by subject and type, receive correct problem-solving approaches, and track your learning progress to identify weak areas.

**Highlights:** Photo upload for questions and test papers, AI error diagnosis and correction guidance, Organize mistakes by subject and error type, Track learning progress and identify weak areas, Privacy protection with local AI analysis

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 100 AI calls | $0.99 | one-time |
| 1000 AI Calls | $4.99 | one-time |
| 5000 AI Calls | $24.99 | one-time |


### 大学搜题

[App page](https://appshunter.io/ios/app/id6797424917)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月会员 | $3.99 | per month |
| 年会员 | $9.99 | per year |
| 永久会员 | $14.99 | one-time |


## Frequently asked questions

### Is AI错题树 free?

AI错题树 is free to download, with in-app purchases available.

### Is 大学搜题 free?

大学搜题 is free to download, with in-app purchases available.

### Do AI错题树 or 大学搜题 have ads?

Neither AI错题树 nor 大学搜题 shows ads.

### Which is updated more often, AI错题树 or 大学搜题?

AI错题树 ships an update weekly, and 大学搜题 every 3 days. Most recently, AI错题树 was updated on October 31, 2026 and 大学搜题 on October 25, 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.*