# Changing the Chemistry vs Turing Fest Summit

The clearest difference is update cadence: Turing Fest Summit at every 2 months against Changing the Chemistry's every 7 months. Turing Fest Summit also leads on iOS requirement (15.6 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Changing the Chemistry ships an update every 7 months, Turing Fest Summit every 2 months. The most recent releases landed on October 18, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Changing the Chemistry | Turing Fest Summit |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 months** |
| Size | 87 MB | 105 MB |
| Requires iOS | 18.0 | **15.6** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [Changing The Chemistry](https://appshunter.io/developer/1670157081) | [Turing Fest](https://appshunter.io/developer/1402503086) |

## What reviewers say

### Changing the Chemistry

[App page](https://appshunter.io/ios/app/changing-the-chemistry/id1670157079)

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

**In-app purchases:** none


### Turing Fest Summit

[App page](https://appshunter.io/ios/app/turing-fest-summit/id6504613633)

**In-app purchases:** none


## Frequently asked questions

### Is Changing the Chemistry free?

Changing the Chemistry is free to download, with no in-app purchases.

### Is Turing Fest Summit free?

Turing Fest Summit is free to download, with no in-app purchases.

### Do Changing the Chemistry or Turing Fest Summit have ads?

Neither Changing the Chemistry nor Turing Fest Summit shows ads.

### Which is updated more often, Changing the Chemistry or Turing Fest Summit?

Changing the Chemistry ships an update every 7 months, and Turing Fest Summit every 2 months. Most recently, Changing the Chemistry was updated on October 18, 2026 and Turing Fest Summit on October 14, 2026.

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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.*