# Physics Constants Library vs PhysicsCompany LearnX

The clearest difference is ads: PhysicsCompany LearnX at none against Physics Constants Library's shown. PhysicsCompany LearnX also leads on device support (3 vs 1) and iOS requirement (15.5 vs 18.4). On price and in-app purchases there is nothing between them.

Both are free to download. Physics Constants Library sells 1 one-off in-app purchase and PhysicsCompany LearnX sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Physics Constants Library | PhysicsCompany LearnX |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 7 months | — |
| Size | 10 MB | 146 MB |
| Requires iOS | 18.4 | **15.5** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ChatStick Company Limited](https://appshunter.io/developer/1165816085) | [Online Learning](https://appshunter.io/developer/1790866777) |

## What reviewers say

### 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 |


### PhysicsCompany LearnX

[App page](https://appshunter.io/ios/app/physicscompany-learnx/id6752291722)

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Package - AR | $29.99 | one-time |
| Package - AV | $34.99 | one-time |
| Package - AY | $39.99 | one-time |
| Package - AW | $39.99 | one-time |
| Package - BA | $39.99 | one-time |
| Package - BD | $39.99 | one-time |
| Package - BE | $44.99 | one-time |
| Package - BF | $49.99 | one-time |
| Package - BG | $49.99 | one-time |
| Package - BH | $49.99 | one-time |


## Frequently asked questions

### Is Physics Constants Library free?

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

### Is PhysicsCompany LearnX free?

PhysicsCompany LearnX is free to download, with in-app purchases available.

### Do Physics Constants Library or PhysicsCompany LearnX have ads?

Physics Constants Library shows ads; PhysicsCompany LearnX 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.*