# AI错题树 vs StudyAgent

The clearest difference is in-app purchases: StudyAgent at none against AI错题树's 3. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. AI错题树 sells 3 one-off in-app purchases. StudyAgent asks for nothing beyond the download.

AI错题树 ships an update every 9 days, StudyAgent every 2 weeks. The most recent releases landed on October 8, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | AI错题树 | StudyAgent |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ai/id6771737023/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 2 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 45 MB | 9 MB |
| Requires iOS | 16.4 | **15.0** |
| 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) | [SANTORAAI, LLC](https://appshunter.io/developer/6804536247) |

## 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 |


### StudyAgent

[App page](https://appshunter.io/ios/app/studyagent/id6807614883)

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

**In-app purchases:** none


## Frequently asked questions

### Is AI错题树 free?

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

### Is StudyAgent free?

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

### Do AI错题树 or StudyAgent have ads?

Neither AI错题树 nor StudyAgent shows ads.

### Which is updated more often, AI错题树 or StudyAgent?

AI错题树 ships an update every 9 days, and StudyAgent every 2 weeks. Most recently, AI错题树 was updated on October 8, 2026 and StudyAgent on October 3, 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.*