# C Questions vs Trigonometry Hong Kong

The clearest difference is iOS requirement: C Questions at 8.0 against Trigonometry Hong Kong's 15.6. 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.

## The numbers

| Metric | C Questions | Trigonometry Hong Kong |
| --- | --- | --- |
| Price | Free | Free |
| 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 |
| Monetization | — | Free |
| Size | 5 MB | 4 MB |
| Requires iOS | **8.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pawanpreet Singh](https://appshunter.io/developer/872471196) | [See Yan Wong](https://appshunter.io/developer/1453422332) |

## What reviewers say

### C Questions

[App page](https://appshunter.io/ios/app/c-questions/id945388481)

**In-app purchases:** none


### 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


## Frequently asked questions

### Is C Questions free?

C Questions is free to download, with no in-app purchases.

### Is Trigonometry Hong Kong free?

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

### Do C Questions or Trigonometry Hong Kong have ads?

Neither C Questions nor Trigonometry Hong Kong 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.*