# OpenMind AI vs 3Denkou

The clearest difference is update cadence: 3Denkou at every 3 days against OpenMind AI's every 3 weeks. 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.

OpenMind AI ships an update every 3 weeks, 3Denkou every 3 days. The most recent releases landed on October 2, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | OpenMind AI | 3Denkou |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/openmind-ai/id6749165417/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Monetization | Free | — |
| Size | 56 MB | 56 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Sandbox Inc.](https://appshunter.io/developer/1776407890) | [Kennedy Murakami](https://appshunter.io/developer/1578460606) |

## What reviewers say

### OpenMind AI

[App page](https://appshunter.io/ios/app/openmind-ai/id6749165417)

Contribute to robot development by reviewing video footage and providing wireless signal data. Participate in quests to enhance robot safety and intelligence in real-world settings.

**Highlights:** Review robot videos, Contribute wireless signal insights, Join robot improvement quests, Enhance robot safety, Improve robot intelligence

**Features:** macOS Compatibility

**In-app purchases:** none


### 3Denkou

[App page](https://appshunter.io/ios/app/3denkou/id6789784377)

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

**In-app purchases:** none


## Frequently asked questions

### Is OpenMind AI free?

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

### Is 3Denkou free?

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

### Do OpenMind AI or 3Denkou have ads?

Neither OpenMind AI nor 3Denkou shows ads.

### Which is updated more often, OpenMind AI or 3Denkou?

OpenMind AI ships an update every 3 weeks, and 3Denkou every 3 days. Most recently, OpenMind AI was updated on October 2, 2026 and 3Denkou on October 15, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*