# Errolux DSE數學錯題簿 vs LearnSys DSE Study Captain

The clearest difference is iOS requirement: Errolux DSE數學錯題簿 at 15.0.0 against LearnSys DSE Study Captain's 17.0. On price, ads, in-app purchases 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 and LearnSys DSE Study Captain sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Errolux DSE數學錯題簿 | LearnSys DSE Study Captain |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Daily | — |
| Size | 62 MB | 3 MB |
| Requires iOS | **15.0.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kin Wai NG](https://appshunter.io/developer/1848593790) | [Mobpage Holdings Limited](https://appshunter.io/developer/1030700440) |

## 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 |


### LearnSys DSE Study Captain

[App page](https://appshunter.io/ios/app/learnsys-dse-study-captain/id6803014538)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Captain Pro | $4.99 | one-time |


## 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 LearnSys DSE Study Captain free?

LearnSys DSE Study Captain is free to download, with in-app purchases available.

### Do Errolux DSE數學錯題簿 or LearnSys DSE Study Captain have ads?

Neither Errolux DSE數學錯題簿 nor LearnSys DSE Study Captain shows ads.

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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.*