# StackChan World vs Reachy's Brain

StackChan World and Reachy's Brain are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

StackChan World ships an update every 6 days, Reachy's Brain every 2 weeks. The most recent releases landed on September 24, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | StackChan World | Reachy's Brain |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.4 (8 ratings)](https://appshunter.io/ios/app/stackchan-world/id6756086326/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 2 weeks |
| Monetization | Free | — |
| Size | 164 MB | 7 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [M5Stack Technology Co., Ltd.](https://appshunter.io/developer/1726975189) | [Brthrs Agency](https://appshunter.io/developer/1145815974) |

## What reviewers say

### StackChan World

[App page](https://appshunter.io/ios/app/stackchan-world/id6756086326)

This app allows users to connect with a cute, AI-powered desktop robot. It provides access to the robot's features and enhances the user experience with its open-source hardware and software.

**Highlights:** AI-powered robot interaction, Open-source hardware and software, App-based pairing with robot, Enhanced user fun and features, Community co-created robot

**Features:** macOS Compatibility

**In-app purchases:** none


### Reachy's Brain

[App page](https://appshunter.io/ios/app/reachys-brain/id6757115923)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is StackChan World free?

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

### Is Reachy's Brain free?

Reachy's Brain is free to download, with no in-app purchases.

### Do StackChan World or Reachy's Brain have ads?

Neither StackChan World nor Reachy's Brain shows ads.

### Which is updated more often, StackChan World or Reachy's Brain?

StackChan World ships an update every 6 days, and Reachy's Brain every 2 weeks. Most recently, StackChan World was updated on September 24, 2026 and Reachy's Brain on September 18, 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.*