# Trigonometry Hong Kong vs High School Physics Practice

The clearest difference is price: Trigonometry Hong Kong at Free against High School Physics Practice's $0.49. High School Physics Practice's advantage is update cadence (every 10 days vs every 34 months) and iOS requirement (13.0 vs 15.6). On ads, in-app purchases and device support there is nothing between them.

Trigonometry Hong Kong is free to download; High School Physics Practice costs $0.49 up front. Neither carries in-app purchases, so what you see is what you pay.

Trigonometry Hong Kong ships an update every 34 months, High School Physics Practice every 10 days. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Trigonometry Hong Kong | High School Physics Practice |
| --- | --- | --- |
| Price | **Free** | $0.49 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/trigonometry-hong-kong/id1557131849/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 34 months | **Every 10 days** |
| Monetization | Free | — |
| Size | 4 MB | 21 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | +17 |
| Developer | [See Yan Wong](https://appshunter.io/developer/1453422332) | [Manish Kumar](https://appshunter.io/developer/1854995154) |

## What reviewers say

### Trigonometry Hong Kong

[App page](https://appshunter.io/ios/app/trigonometry-hong-kong/id1557131849)

This app provides a comprehensive guide to trigonometric formulas essential for Hong Kong university entrance exams. It covers a wide range of formulas, from basic sine and cosine to more advanced compound and subsidiary angle identities.

**Highlights:** Compound Angle Formulas, Subsidiary Angle Formulas, Double Angle Formulas, Triple Angle Formulas, Half Angle Formulas, Product-To-Sum Formulas, Sum-To-Product Formulas

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

**In-app purchases:** none


### High School Physics Practice

[App page](https://appshunter.io/ios/app/high-school-physics-practice/id6756017763)

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

**In-app purchases:** none


## Frequently asked questions

### Is Trigonometry Hong Kong free?

Trigonometry Hong Kong is free to download, with no in-app purchases.

### Is High School Physics Practice free?

High School Physics Practice costs $0.49, with no in-app purchases.

### Do Trigonometry Hong Kong or High School Physics Practice have ads?

Neither Trigonometry Hong Kong nor High School Physics Practice shows ads.

### Which is updated more often, Trigonometry Hong Kong or High School Physics Practice?

Trigonometry Hong Kong ships an update every 34 months, and High School Physics Practice every 10 days. Most recently, Trigonometry Hong Kong was updated on November 3, 2026 and High School Physics Practice on October 30, 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.*