# Stochastic Processes vs Derivative Master by ChatStick

The clearest difference is in-app purchases: Stochastic Processes at none against Derivative Master by ChatStick's 1. Stochastic Processes also leads on iOS requirement (12.0 vs 26.2). Derivative Master by ChatStick's advantage is device support. On price there is nothing between them.

Both are free to download. Derivative Master by ChatStick sells 1 one-off in-app purchase. Stochastic Processes asks for nothing beyond the download.

## The numbers

| Metric | Stochastic Processes | Derivative Master by ChatStick |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | — | Yes |
| Size | 21 MB | 10 MB |
| Requires iOS | **12.0** | 26.2 |
| Devices | — | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Ilona Kosinska](https://appshunter.io/developer/1538804529) | [ChatStick Company Limited](https://appshunter.io/developer/1165816085) |

## What reviewers say

### Stochastic Processes

[App page](https://appshunter.io/ios/app/stochastic-processes/id6737203969)

**In-app purchases:** none


### Derivative Master by ChatStick

[App page](https://appshunter.io/ios/app/derivative-master-by-chatstick/id6770905531)

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

**In-app purchases (1)**

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


## Frequently asked questions

### Is Stochastic Processes free?

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

### Is Derivative Master by ChatStick free?

Derivative Master by ChatStick is free to download, with in-app purchases available.

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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.*