# ZEN browser vs Sudokube 3D

The clearest difference is update cadence: Sudokube 3D at every 5 days against ZEN browser's every 26 months. Sudokube 3D also leads on device support (3 vs 1). ZEN browser's advantage is iOS requirement (9.0 vs 14.0). On price, ads and in-app purchases there is nothing between them.

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

ZEN browser ships an update every 26 months, Sudokube 3D every 5 days. The most recent releases landed on October 22, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | ZEN browser | Sudokube 3D |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/zen-browser/id665543029/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 26 months | **Every 5 days** |
| Monetization | Free | — |
| Size | 45 MB | 10 MB |
| Requires iOS | **9.0** | 14.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | +4 |
| Developer | [Carl Zeiss AG](https://appshunter.io/developer/488066215) | [小健 赵](https://appshunter.io/developer/1521832312) |

## What reviewers say

### ZEN browser

[App page](https://appshunter.io/ios/app/zen-browser/id665543029)

This application allows educators and researchers to navigate and view image databases on iPads. It facilitates collaboration by enabling image sharing, annotation, and Z-stack navigation. Access your research data remotely for presentations and discussions.

**Highlights:** Navigate image databases, View Z-stacks, Insert annotations, Share images with colleagues, Access ZEISS demo server

**In-app purchases:** none


### Sudokube 3D

[App page](https://appshunter.io/ios/app/sudokube-3d/id6479182193)

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

**In-app purchases:** none


## Frequently asked questions

### Is ZEN browser free?

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

### Is Sudokube 3D free?

Sudokube 3D is free to download, with no in-app purchases.

### Do ZEN browser or Sudokube 3D have ads?

Neither ZEN browser nor Sudokube 3D shows ads.

### Which is updated more often, ZEN browser or Sudokube 3D?

ZEN browser ships an update every 26 months, and Sudokube 3D every 5 days. Most recently, ZEN browser was updated on October 22, 2026 and Sudokube 3D on October 15, 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.*