# Actioforma KOS vs Immunity Science

The clearest difference is in-app purchases: Immunity Science at none against Actioforma KOS's 2. Actioforma KOS's advantage is update cadence (every 2 months vs every 14 months) and iOS requirement (7.0 vs 13.0). On price, ads and device support there is nothing between them.

Both are free to download. Actioforma KOS sells 2 one-off in-app purchases. Immunity Science asks for nothing beyond the download.

Actioforma KOS ships an update every 2 months, Immunity Science every 14 months. The most recent releases landed on October 7, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Actioforma KOS | Immunity Science |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 14 months |
| Monetization | Free | — |
| Size | 18 MB | 32 MB |
| Requires iOS | **7.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [META Corporation Japan Ltd.](https://appshunter.io/developer/589751339) | [Immunity Science, Inc.](https://appshunter.io/developer/1672160767) |

## What reviewers say

### Actioforma KOS

[App page](https://appshunter.io/ios/app/actioforma-kos/id589751336)

Explore biology and medical concepts with immersive 3D content, including electron microscopy and CT scans. View on your device or connect to a 3D TV for enhanced learning. Interactive features allow detailed examination of biological structures.

**Highlights:** 3D electron microscopic images, Interactive 3D CT content, Adjustable view angles, size, and transparency, Stereoscopic viewing with/without glasses, External display support for 3D TVs/projectors, Content view history, Display user's 3D content

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SEM Section of the Rat Liver | $0.99 | one-time |
| CT image of Japanese Rat Snake | $0.99 | one-time |


### Immunity Science

[App page](https://appshunter.io/ios/app/immunity-science/id1672160765)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Actioforma KOS free?

Actioforma KOS is free to download, with in-app purchases available.

### Is Immunity Science free?

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

### Do Actioforma KOS or Immunity Science have ads?

Neither Actioforma KOS nor Immunity Science shows ads.

### Which is updated more often, Actioforma KOS or Immunity Science?

Actioforma KOS ships an update every 2 months, and Immunity Science every 14 months. Most recently, Actioforma KOS was updated on October 7, 2026 and Immunity Science on October 3, 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.*