# ClassIn vs 错题星

The clearest difference is update cadence: ClassIn at every 11 days against 错题星's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. ClassIn sells 11 one-off in-app purchases and 错题星 sells 15 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ClassIn ships an update every 11 days, 错题星 every 3 weeks. The most recent releases landed on September 29, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | ClassIn | 错题星 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.6 (1K ratings)](https://appshunter.io/ios/app/classin/id1226361488/reviews)** | — |
| Number of ratings | **1K** | — |
| Positive reviews | 50.5% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 11 days** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 286 MB | 95 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [EEO Education Ltd.](https://appshunter.io/developer/1158875965) | [武汉未来之星人工智能科技有限公司](https://appshunter.io/developer/1770241827) |

## What reviewers say

### ClassIn

[App page](https://appshunter.io/ios/app/classin/id1226361488)

This integrated platform supports online and offline teaching with features like live classrooms, LMS, and personalized learning environments. It aims to empower educators and learners globally, fostering independent and self-disciplined lifelong learning.

**Highlights:** Online live classrooms, Offline smart classrooms, Learning Management System (LMS), Personal Learning Environment (PLE), Collaborative blackboard, Virtual experiments

**Features:** Vision Pro support

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Purchase 4 additional lesson | $2.99 | one-time |
| Purchase 12 additional lesson | $9.99 | one-time |
| Purchase 14 additional lesson | $11.99 | one-time |
| Purchase 15 additional lesson | $12.99 | one-time |
| Purchase 16 additional lesson | $12.99 | one-time |
| Pro Edition | $14.99 | one-time |
| Purchase 18 additional lesson | $14.99 | one-time |
| Purchase 17 additional lesson | $14.99 | one-time |
| Purchase 19 additional lesson | $14.99 | one-time |
| Monthly Edition | $17.99 | one-time |
| Purchase 20 additional lesson | $17.99 | one-time |

**What reviewers like**

- 💡 Useful features for education
- 👍 Great for learning Chinese
- 🚀 Efficient for online classes
- 🤝 Good for teacher-student interaction

**What reviewers complain about**

- 🐛 Buggy and unstable
- 🔋 High battery consumption
- 🤔 Confusing user interface
- 🤷‍♀️ Lack of privacy for students

**Reported bugs**

- Frequent crashes and freezes
- Issues with file uploads and downloads
- Microphone and camera problems
- Incompatibility with certain devices

**Requested features**

- Add autosave feature
- Improve screen sharing capabilities
- Enhance mobile app compatibility
- Provide better language support


### 错题星

[App page](https://appshunter.io/ios/app/ai/id1602483511)

**Features:** macOS Compatibility

**In-app purchases (15)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1个月会员 | $3.99 | one-time |
| 12个月会员（优惠） | $26.99 | one-time |
| 1年会员（原价） | $29.99 | one-time |
| 2年会员（原价） | $39.99 | one-time |
| 12个月SVIP | $39.99 | one-time |
| 36个月会员（优惠） | $46.99 | one-time |
| 48个月SVIP | $59.99 | one-time |
| 72个月SVIP | $59.99 | one-time |
| 72个月VIP | $59.99 | one-time |
| 60个月SVIP | $59.99 | one-time |
| 96个月SVIP | $69.99 | one-time |
| 108个月SVIP | $69.99 | one-time |
| 36个月 | $109.99 | one-time |
| 终身SVIP（优惠） | $149.99 | one-time |
| 终身SVIP | $399.99 | one-time |


## Frequently asked questions

### Is ClassIn free?

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

### Is 错题星 free?

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

### Do ClassIn or 错题星 have ads?

Neither ClassIn nor 错题星 shows ads.

### Which is updated more often, ClassIn or 错题星?

ClassIn ships an update every 11 days, and 错题星 every 3 weeks. Most recently, ClassIn was updated on September 29, 2026 and 错题星 on September 9, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*