# Trigonometry and functions vs Physics Constants Library

The clearest difference is price: Physics Constants Library at Free against Trigonometry and functions's $3.99. Trigonometry and functions's advantage is in-app purchases (none vs 1) and ads (none vs shown). On iOS requirement there is nothing between them.

Physics Constants Library is free to download; Trigonometry and functions costs $3.99 up front. Physics Constants Library sells 1 one-off in-app purchase. Trigonometry and functions asks for nothing beyond the download.

## The numbers

| Metric | Trigonometry and functions | Physics Constants Library |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | — | Every 7 months |
| Size | 1 MB | 10 MB |
| Requires iOS | **17.6** | 18.4 |
| Devices | **iPhone, iPad, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Gomathy Shankaran](https://appshunter.io/developer/503956143) | [ChatStick Company Limited](https://appshunter.io/developer/1165816085) |

## What reviewers say

### Trigonometry and functions

[App page](https://appshunter.io/ios/app/trigonometry-and-functions/id6739970869)

**Features:** Vision Pro support

**In-app purchases:** none


### Physics Constants Library

[App page](https://appshunter.io/ios/app/physics-constants-library/id6751224343)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Features | $2.99 | one-time |


## Frequently asked questions

### Is Trigonometry and functions free?

Trigonometry and functions costs $3.99, with no in-app purchases.

### Is Physics Constants Library free?

Physics Constants Library is free to download, with in-app purchases available.

### Do Trigonometry and functions or Physics Constants Library have ads?

Physics Constants Library shows ads; Trigonometry and functions does not.

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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.*