# MarginNote 4 vs 错题本

The clearest difference is ratings volume: MarginNote 4 at 716 against 错题本's 5. MarginNote 4 also leads on rating (4.5 vs 4.2) and update cadence (every 3 weeks vs every 2 months). 错题本's advantage is iOS requirement (13.0 vs 17.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. MarginNote 4 sells 12 in-app purchases, starting at $1.99 per month and 错题本 sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

MarginNote 4 holds the better App Store score, 4.5 against 4.2. That said, the two scores are not equally well evidenced: MarginNote 4 has 716 ratings behind it against 5, so its average is the more settled of the two.

MarginNote 4 ships an update every 3 weeks, 错题本 every 2 months. The most recent releases landed on September 29, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | MarginNote 4 | 错题本 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (716 ratings)](https://appshunter.io/ios/app/marginnote-4-ai-notesmindmap/id1531657269/reviews)** | [4.2 (5 ratings)](https://appshunter.io/ios/app/id6448860597/reviews) |
| Number of ratings | **716** | 5 |
| Positive reviews | 58.6% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | Freemium |
| Size | 330 MB | 46 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Beijing Yunsi Software Technology Co., Ltd](https://appshunter.io/developer/723205556) | [深圳市美易网科技有限公司](https://appshunter.io/developer/1647736306) |

## What reviewers say

### MarginNote 4

[App page](https://appshunter.io/ios/app/marginnote-4-ai-notesmindmap/id1531657269)

This app integrates reading, note-taking, mind mapping, and flashcards into a unified study environment. It supports active learning with features like study sets, book compilation, and dual-article views. Enhance your understanding with visual learning tools and AI-powered content extraction for long-term memory retention.

**Highlights:** Integrated reading, note-taking, mind mapping, and flashcards, Quick Extend Note and Handwriting Layers for annotation, Study Set for organizing PDFs, EPUBs, videos, and audio, Mind Map and Concept Diagram for visual learning, AI Content Detection for formula and chart extraction, FSRS spaced-repetition algorithm for reviews, iCloud sync across Apple devices

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

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Subscription to MAX (Monthly) | $1.99 | per month |
| Subscription to MAX (3 months) | $4.99 | per 3 months |
| Subscription to MAX (6 months) | $7.99 | per 6 months |
| Subscription to MAX (Annually) | $12.99 | per year |
| MarginNote Max Annual | $16.99 | per year |
| 14 days Free Trial | Free | one-time |
| Upgrade to PRO from MN3(iOS) | $4.99 | one-time |
| Unlock PRO Forever (New) | $12.99 | one-time |
| Upgrade to MAX from MN3(macOS) | $19.99 | one-time |
| Unlock MAX based on PRO | $39.99 | one-time |
| Unlock MAX based on PRO (New) | $40.00 | one-time |
| Unlock MAX Forever (New) | $51.99 | one-time |

**What reviewers like**

- 🚀 Powerful features
- 📚 Great for academic/research use
- 👍 Useful note-taking and organization
- 🖊️ Improved handwriting and annotation

**What reviewers complain about**

- 🐛 Buggy and crashes frequently
- 🕰️ Slow and laggy sync between devices
- 🤯 Steep learning curve, poor documentation
- 💰 Expensive upgrade from previous version

**Reported bugs**

- Disappearing annotations when using extend function
- Inability to restore accidentally deleted mind maps
- Inconsistent behavior with PDF file management

**Requested features**

- Improved iCloud/cloud sync reliability
- More intuitive and user-friendly interface
- Better support for external document libraries
- Ability to disable auto-excerpt selection


### 错题本

[App page](https://appshunter.io/ios/app/id6448860597)

This learning tool helps students and parents efficiently manage incorrect answers from homework and tests. It uses advanced technology to quickly capture, organize, and review mistakes, making studying smarter and more effective.

**Highlights:** Photo capture of incorrect answers, Automatic removal of handwriting, Subject-based categorization, Detailed breakdown of questions and solutions, Custom practice test generation, Daily review for targeted learning

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 连续包月 | $1.99 | per month |
| 连续包年 | $9.99 | per year |


## Frequently asked questions

### Is MarginNote 4 free?

MarginNote 4 is free to download, with in-app purchases available.

### Is 错题本 free?

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

### Which has better reviews, MarginNote 4 or 错题本?

MarginNote 4 is rated higher. MarginNote 4 averages 4.5 out of 5 from 716 ratings, while 错题本 averages 4.2 from 5 ratings.

### Do MarginNote 4 or 错题本 have ads?

Neither MarginNote 4 nor 错题本 shows ads.

### Which is updated more often, MarginNote 4 or 错题本?

MarginNote 4 ships an update every 3 weeks, and 错题本 every 2 months. Most recently, MarginNote 4 was updated on September 29, 2026 and 错题本 on September 19, 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.*