# Chemistry Pro vs Oxidation Numbers

The clearest difference is in-app purchases: Oxidation Numbers at none against Chemistry Pro's 2. Oxidation Numbers also leads on iOS requirement (13.0 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. Chemistry Pro sells 2 in-app purchases, starting at $4.99 per 7 days. Oxidation Numbers asks for nothing beyond the download.

## The numbers

| Metric | Chemistry Pro | Oxidation Numbers |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Size | 48 MB | 24 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Oussama Anedam](https://appshunter.io/developer/1850303135) | [Shraddhaben Parmar](https://appshunter.io/developer/1889769325) |

## What reviewers say

### Chemistry Pro

[App page](https://appshunter.io/ios/app/chemistry-pro-homework-solver/id6757357777)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Chemistry Pro | $4.99 | per 7 days |
| Chemistry Pro | $49.99 | per year |


### Oxidation Numbers

[App page](https://appshunter.io/ios/app/oxidation-numbers/id6768608241)

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

**In-app purchases:** none


## Frequently asked questions

### Is Chemistry Pro free?

Chemistry Pro is free to download, with in-app purchases available.

### Is Oxidation Numbers free?

Oxidation Numbers is free to download, with no in-app purchases.

### Do Chemistry Pro or Oxidation Numbers have ads?

Neither Chemistry Pro nor Oxidation Numbers 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.*