# Errolux DSE數學錯題簿 vs Mathji Math Practice & Quizzes

The clearest difference is in-app purchases: Mathji Math Practice & Quizzes at none against Errolux DSE數學錯題簿's 3. Errolux DSE數學錯題簿's advantage is update cadence (daily vs every 2 months) and iOS requirement (15.0.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Errolux DSE數學錯題簿 sells 3 in-app purchases, starting at $4.99 per month. Mathji Math Practice & Quizzes asks for nothing beyond the download.

Errolux DSE數學錯題簿 ships an update daily, Mathji Math Practice & Quizzes every 2 months. Both last shipped on November 5, 2026.

## The numbers

| Metric | Errolux DSE數學錯題簿 | Mathji Math Practice & Quizzes |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mathji-math-practice-and-quizzes/id6776072306/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Daily** | Every 2 months |
| Monetization | — | Free |
| Size | 62 MB | 43 MB |
| Requires iOS | **15.0.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Kin Wai NG](https://appshunter.io/developer/1848593790) | [Yu-Hui Chen](https://appshunter.io/developer/364246330) |

## What reviewers say

### Errolux DSE數學錯題簿

[App page](https://appshunter.io/ios/app/errolux-dse/id6754518544)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Errolux Pro - Monthly Subscription | $4.99 | per month |
| Errolux Pro - Annual Subscription | $34.99 | per year |
| Errolux Pro User | $69.99 | one-time |


### Mathji Math Practice & Quizzes

[App page](https://appshunter.io/ios/app/mathji-math-practice-and-quizzes/id6776072306)

This app offers adaptive math practice for students in grades 1-12, generating unique questions and adjusting difficulty based on performance. It tracks progress, provides personalized review, and includes a parent dashboard for monitoring. Kids can earn rewards to stay motivated.

**Highlights:** Smart question generation (200+ topics), Adaptive difficulty adjustment, Mistake notebook and personalized review, PIN-protected parent dashboard, Reward system for motivation, Multilingual support (5 languages)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Errolux DSE數學錯題簿 free?

Errolux DSE數學錯題簿 is free to download, with in-app purchases available.

### Is Mathji Math Practice & Quizzes free?

Mathji Math Practice & Quizzes is free to download, with no in-app purchases.

### Do Errolux DSE數學錯題簿 or Mathji Math Practice & Quizzes have ads?

Neither Errolux DSE數學錯題簿 nor Mathji Math Practice & Quizzes shows ads.

### Which is updated more often, Errolux DSE數學錯題簿 or Mathji Math Practice & Quizzes?

Errolux DSE數學錯題簿 ships an update daily, and Mathji Math Practice & Quizzes every 2 months. Most recently, Errolux DSE數學錯題簿 was updated on November 5, 2026 and Mathji Math Practice & Quizzes on November 5, 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.*