# DSE 數學公式 vs 化學之書

The clearest difference is update cadence: 化學之書 at every 3 weeks against DSE 數學公式's every 3 months. DSE 數學公式's advantage is iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

DSE 數學公式 ships an update every 3 months, 化學之書 every 3 weeks. The most recent releases landed on November 3, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | DSE 數學公式 | 化學之書 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/dse/id1268404729/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 27 MB | 55 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Moux Interactive Limited](https://appshunter.io/developer/1268404728) | [BUDDHIST HO NAM KAM COLLEGE](https://appshunter.io/developer/1532349038) |

## What reviewers say

### DSE 數學公式

[App page](https://appshunter.io/ios/app/dse/id1268404729)

Access essential formulas and theorems for the HKDSE Mathematics exam. This app helps Hong Kong students easily find and bookmark key information for revision. It supports English and Chinese languages.

**Highlights:** Formulas and theorems for HKDSE Math, Graph visualizations for formulas, Bookmark important pages, Supports English, Traditional Chinese, Simplified Chinese, Covers various math categories

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

**In-app purchases:** none


### 化學之書

[App page](https://appshunter.io/ios/app/id1512573867)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is DSE 數學公式 free?

DSE 數學公式 is free to download, with no in-app purchases.

### Is 化學之書 free?

化學之書 is free to download, with no in-app purchases.

### Do DSE 數學公式 or 化學之書 have ads?

Neither DSE 數學公式 nor 化學之書 shows ads.

### Which is updated more often, DSE 數學公式 or 化學之書?

DSE 數學公式 ships an update every 3 months, and 化學之書 every 3 weeks. Most recently, DSE 數學公式 was updated on November 3, 2026 and 化學之書 on October 27, 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.*