# TetraScience vs StackChan World

The clearest difference is iOS requirement: TetraScience at 13.4 against StackChan World's 16.4. On price, update cadence, 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.

TetraScience ships an update every 9 days, StackChan World weekly. The most recent releases landed on November 4, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | TetraScience | StackChan World |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.8 (13 ratings)](https://appshunter.io/ios/app/stackchan-world/id6756086326/reviews)** |
| Number of ratings | — | **13** |
| Positive reviews | — | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 days | **Weekly** |
| Monetization | — | Free |
| Size | 105 MB | 160 MB |
| Requires iOS | **13.4** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [TetraScience Inc.](https://appshunter.io/developer/1097870183) | [M5Stack Technology Co., Ltd.](https://appshunter.io/developer/1726975189) |

## What reviewers say

### TetraScience

[App page](https://appshunter.io/ios/app/tetrascience/id6636511009)

**Features:** macOS Compatibility

**In-app purchases:** none


### StackChan World

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

This app connects to a cute, AI-powered desktop robot. It unlocks additional fun and functionality for the robot, which features open-source hardware and software. Users can pair their device to enhance their robot experience.

**Highlights:** Connect to AI robot, Unlock additional robot fun, Open-source hardware and software integration, Pair with your robot

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TetraScience free?

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

### Is StackChan World free?

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

### Do TetraScience or StackChan World have ads?

Neither TetraScience nor StackChan World shows ads.

### Which is updated more often, TetraScience or StackChan World?

TetraScience ships an update every 9 days, and StackChan World weekly. Most recently, TetraScience was updated on November 4, 2026 and StackChan World on November 9, 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.*