# Errolux DSE數學錯題簿 vs TY Maths

The clearest difference is in-app purchases: TY Maths at none against Errolux DSE數學錯題簿's 3. TY Maths also leads on iOS requirement (13.0 vs 15.0.0). Errolux DSE數學錯題簿's advantage is update cadence (daily vs every 5 days). 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. TY Maths asks for nothing beyond the download.

Errolux DSE數學錯題簿 ships an update daily, TY Maths every 5 days. Both last shipped on September 17, 2026.

## The numbers

| Metric | Errolux DSE數學錯題簿 | TY Maths |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Daily** | Every 5 days |
| Size | 62 MB | 46 MB |
| Requires iOS | 15.0.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kin Wai NG](https://appshunter.io/developer/1848593790) | [Wing Kit Yu](https://appshunter.io/developer/6776310583) |

## 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 |


### TY Maths

[App page](https://appshunter.io/ios/app/ty-maths/id6776310581)

**Features:** macOS Compatibility, 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 TY Maths free?

TY Maths is free to download, with no in-app purchases.

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

Neither Errolux DSE數學錯題簿 nor TY Maths shows ads.

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

Errolux DSE數學錯題簿 ships an update daily, and TY Maths every 5 days. Most recently, Errolux DSE數學錯題簿 was updated on September 17, 2026 and TY Maths on September 17, 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.*