# 洋葱学园 vs 错题plus

The clearest difference is ads: 错题plus at none against 洋葱学园's shown. 洋葱学园's advantage is update cadence (fortnightly vs every 6 weeks). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. 洋葱学园 sells 12 one-off in-app purchases and 错题plus sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

洋葱学园 ships an update fortnightly, 错题plus every 6 weeks. The most recent releases landed on September 22, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | 洋葱学园 | 错题plus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (91 ratings)](https://appshunter.io/ios/app/id990959871/reviews)** | — |
| Number of ratings | **91** | — |
| Positive reviews | 65.9% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 6 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 122 MB | 48 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Guanghe](https://appshunter.io/developer/990959870) | [Shanghai Qiben Information Technology Co., Ltd.](https://appshunter.io/developer/1476015216) |

## What reviewers say

### 洋葱学园

[App page](https://appshunter.io/ios/app/id990959871)

This platform offers animated online courses for K-12 students covering math, physics, and other subjects. It features AI-powered personalized learning plans, instant AI tutor support for questions, and a unique photo-based problem-solving tool that teaches concepts before providing solutions. The goal is to help students quickly grasp difficult concepts and improve their academic performance.

**Highlights:** AI personalized learning plans, Animated AI tutor for instant Q&A, Photo-based problem-solving with concept explanation, Animated courses for math and physics, Gamified learning mechanisms

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

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 洋葱课程 | $0.99 | one-time |
| 6个月高中数学洋葱课程 | $21.99 | one-time |
| 3个月初中数学洋葱课程 | $29.99 | one-time |
| 3个月高中数学洋葱课程 | $29.99 | one-time |
| 3个月初中物理洋葱课程 | $29.99 | one-time |
| 洋葱课程 | $29.99 | one-time |
| 12个月初中物理洋葱课程 | $37.99 | one-time |
| 洋葱课程 | $39.99 | one-time |
| 6个月初中数学洋葱课程 | $46.99 | one-time |
| 12个月初中数学洋葱课程 | $69.99 | one-time |
| 洋葱课程 | $69.99 | one-time |
| 洋葱课程 | $99.99 | one-time |


### 错题plus

[App page](https://appshunter.io/ios/app/plus/id1476015217)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 首月优惠价 | $1.99 | one-time |
| VIP包月 | $9.99 | one-time |
| 团购VIP包年 | $49.99 | one-time |
| VIP包年 | $59.99 | one-time |


## Frequently asked questions

### Is 洋葱学园 free?

洋葱学园 is free to download, with in-app purchases available.

### Is 错题plus free?

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

### Do 洋葱学园 or 错题plus have ads?

洋葱学园 shows ads; 错题plus does not.

### Which is updated more often, 洋葱学园 or 错题plus?

洋葱学园 ships an update fortnightly, and 错题plus every 6 weeks. Most recently, 洋葱学园 was updated on September 22, 2026 and 错题plus on September 12, 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.*