# Thermochemistry vs MaxwellsDemon

The clearest difference is price: MaxwellsDemon at $0.99 against Thermochemistry's $3.99. MaxwellsDemon also leads on iOS requirement (14.4 vs 17.0). Thermochemistry's advantage is update cadence (every 4 months vs every 9 months). On ads, in-app purchases and device support there is nothing between them.

Thermochemistry costs $3.99 and MaxwellsDemon $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Thermochemistry ships an update every 4 months, MaxwellsDemon every 9 months. The most recent releases landed on September 22, 2026 and August 24, 2026 respectively.

## The numbers

| Metric | Thermochemistry | MaxwellsDemon |
| --- | --- | --- |
| Price | $3.99 | **$0.99** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 9 months |
| Size | 1 MB | 1 MB |
| Requires iOS | 17.0 | **14.4** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Roman Volinsky](https://appshunter.io/developer/977951850) | [Takao Akatsu](https://appshunter.io/developer/1530946331) |

## What reviewers say

### Thermochemistry

[App page](https://appshunter.io/ios/app/thermochemistry/id1095024444)

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

**In-app purchases:** none


### MaxwellsDemon

[App page](https://appshunter.io/ios/app/maxwellsdemon/id1612817641)

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

**In-app purchases:** none


## Frequently asked questions

### Is Thermochemistry free?

Thermochemistry costs $3.99, with no in-app purchases.

### Is MaxwellsDemon free?

MaxwellsDemon costs $0.99, with no in-app purchases.

### Do Thermochemistry or MaxwellsDemon have ads?

Neither Thermochemistry nor MaxwellsDemon shows ads.

### Which is updated more often, Thermochemistry or MaxwellsDemon?

Thermochemistry ships an update every 4 months, and MaxwellsDemon every 9 months. Most recently, Thermochemistry was updated on September 22, 2026 and MaxwellsDemon on August 24, 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.*