# PSSMath vs Chemistry Toolbox

The clearest difference is in-app purchases: PSSMath at none against Chemistry Toolbox's 2. PSSMath also leads on iOS requirement (15.1 vs 17.6). On price, ads and device support there is nothing between them.

Both are free to download. Chemistry Toolbox sells 2 one-off in-app purchases. PSSMath asks for nothing beyond the download.

## The numbers

| Metric | PSSMath | Chemistry Toolbox |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Daily |
| Size | 32 MB | 12 MB |
| Requires iOS | **15.1** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [DESMOND WARRINGTON](https://appshunter.io/developer/1864525985) | [Florent Breton](https://appshunter.io/developer/1184085186) |

## What reviewers say

### PSSMath

[App page](https://appshunter.io/ios/app/pssmath/id6757955212)

**In-app purchases:** none


### Chemistry Toolbox

[App page](https://appshunter.io/ios/app/chemistry-toolbox/id6764052683)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One month subscription | $0.99 | one-time |
| Full app | $4.99 | one-time |


## Frequently asked questions

### Is PSSMath free?

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

### Is Chemistry Toolbox free?

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

### Do PSSMath or Chemistry Toolbox have ads?

Neither PSSMath nor Chemistry Toolbox 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.*