# Errolux DSE數學錯題簿 vs EduPrep

Errolux DSE數學錯題簿 and EduPrep are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Errolux DSE數學錯題簿 sells 3 in-app purchases, starting at $4.99 per month and EduPrep sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Errolux DSE數學錯題簿 ships an update daily, EduPrep every 3 days. The most recent releases landed on October 4, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Errolux DSE數學錯題簿 | EduPrep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 3 days |
| Size | 62 MB | 39 MB |
| Requires iOS | **15.0.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kin Wai NG](https://appshunter.io/developer/1848593790) | [KA KIT YAU](https://appshunter.io/developer/6771674382) |

## 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 |


### EduPrep

[App page](https://appshunter.io/ios/app/eduprep/id6780317071)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Welcome offer | $0.99 | one-time |
| 入門包 | $1.99 | one-time |
| 標準包 | $5.99 | one-time |
| 家庭包 | $9.99 | one-time |
| 超值包 | $17.99 | 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 EduPrep free?

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

### Do Errolux DSE數學錯題簿 or EduPrep have ads?

Neither Errolux DSE數學錯題簿 nor EduPrep shows ads.

### Which is updated more often, Errolux DSE數學錯題簿 or EduPrep?

Errolux DSE數學錯題簿 ships an update daily, and EduPrep every 3 days. Most recently, Errolux DSE數學錯題簿 was updated on October 4, 2026 and EduPrep on October 3, 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.*