# 错题本 vs 纳米AI

The clearest difference is update cadence: 纳米AI at weekly against 错题本's every 2 months. 纳米AI also leads on ratings volume (211 vs 5). 错题本's advantage is iOS requirement (13.0 vs 15.0). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. 错题本 sells 2 in-app purchases, starting at $1.99 per month and 纳米AI sells 14 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.2 for 错题本 against 4.3 for 纳米AI. That said, the two scores are not equally well evidenced: 纳米AI has 211 ratings behind it against 5, so its average is the more settled of the two.

错题本 ships an update every 2 months, 纳米AI weekly. The most recent releases landed on September 19, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | 错题本 | 纳米AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (5 ratings)](https://appshunter.io/ios/app/id6448860597/reviews) | **[4.3 (211 ratings)](https://appshunter.io/ios/app/ai/id6737763506/reviews)** |
| Number of ratings | 5 | **211** |
| Positive reviews | — | 53.8% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Freemium | Free with in-app purchases |
| Size | 46 MB | 231 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [深圳市美易网科技有限公司](https://appshunter.io/developer/1647736306) | [Beijing Qihoo Technology Co Ltd](https://appshunter.io/developer/441216575) |

## What reviewers say

### 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 |


### 纳米AI

[App page](https://appshunter.io/ios/app/ai/id6737763506)

This app acts as a super intelligent agent, generating expert-level videos, reports, and presentations from simple text prompts. It offers specialized AI agents for various tasks, including image editing, digital human video creation, and PPT generation, all powered by multiple large language models.

**Highlights:** Generate videos, reports, and PPTs from text, Specialized AI agents for various tasks, Digital human video creation, Professional image editing, PPT generation from themes or files, Integrated with 16 large language models, Personalized knowledge base

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

**In-app purchases (14)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 连续包月VIP | $6.99 | per month |
| 连续包季VIP | $19.99 | per 3 months |
| 连续包年VIP | $69.99 | per year |
| 100纳米 | $0.99 | one-time |
| 300纳米 | $3.99 | one-time |
| 1个月VIP | $7.99 | one-time |
| 1000纳米 | $14.99 | one-time |
| 6个月VIP | $49.99 | one-time |
| 年卡（活动） | $59.99 | one-time |
| 5000纳米 | $69.99 | one-time |
| 15个月VIP（限时活动） | $79.99 | one-time |
| 12个月VIP | $79.99 | one-time |
| 36个月 | $99.99 | one-time |
| 10000纳米 | $149.99 | one-time |

**What reviewers like**

- 🚀 Fast search and text organization capabilities
- 👍 Feels good
- 🚀 Fast response speed
- 👍 Convenient and practical

**What reviewers complain about**

- 🐛 No dark mode
- 🐛 Unable to open on Apple Mac
- 🗑️ Trash software
- 🗑️ Deceptive advertising
- 🗑️ Terrible company and software

**Reported bugs**

- Unable to receive verification code for overseas users
- App crashes on older devices

**Requested features**

- Dark mode option
- AI video generation queue improvement


## Frequently asked questions

### Is 错题本 free?

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

### Is 纳米AI free?

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

### Which has better reviews, 错题本 or 纳米AI?

纳米AI is rated higher. 错题本 averages 4.2 out of 5 from 5 ratings, while 纳米AI averages 4.3 from 211 ratings.

### Do 错题本 or 纳米AI have ads?

Neither 错题本 nor 纳米AI shows ads.

### Which is updated more often, 错题本 or 纳米AI?

错题本 ships an update every 2 months, and 纳米AI weekly. Most recently, 错题本 was updated on September 19, 2026 and 纳米AI on September 28, 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.*