# MaxwellsDemon vs KAGAKU

The clearest difference is price: KAGAKU at Free against MaxwellsDemon's $0.99. KAGAKU also leads on update cadence (every 3 months vs every 9 months). MaxwellsDemon's advantage is ads (none vs shown). On in-app purchases, device support and iOS requirement there is nothing between them.

KAGAKU is free to download; MaxwellsDemon costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

MaxwellsDemon ships an update every 9 months, KAGAKU every 3 months. The most recent releases landed on November 3, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | MaxwellsDemon | KAGAKU |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 9 months | **Every 3 months** |
| Size | 1 MB | 29 MB |
| Requires iOS | **14.4** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Takao Akatsu](https://appshunter.io/developer/1530946331) | [Fuji Bit Inc.](https://appshunter.io/developer/1874205957) |

## What reviewers say

### MaxwellsDemon

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

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

**In-app purchases:** none


### KAGAKU

[App page](https://appshunter.io/ios/app/kagaku/id6763080354)

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

**In-app purchases:** none


## Frequently asked questions

### Is MaxwellsDemon free?

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

### Is KAGAKU free?

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

### Do MaxwellsDemon or KAGAKU have ads?

KAGAKU shows ads; MaxwellsDemon does not.

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

MaxwellsDemon ships an update every 9 months, and KAGAKU every 3 months. Most recently, MaxwellsDemon was updated on November 3, 2026 and KAGAKU on October 29, 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.*