# ZBX robot vs QY STEM

The clearest difference is iOS requirement: ZBX robot at 8.0 against QY STEM's 12.0. 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.

ZBX robot ships an update every 2 months, QY STEM every 6 weeks. The most recent releases landed on September 14, 2026 and August 6, 2026 respectively.

## The numbers

| Metric | ZBX robot | QY STEM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/qy-stem/id6444227932/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | — | Free |
| Size | 76 MB | 137 MB |
| Requires iOS | **8.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [广州途道信息科技有限公司](https://appshunter.io/developer/1228572324) | [广东群宇互动科技有限公司](https://appshunter.io/developer/1019985641) |

## What reviewers say

### ZBX robot

[App page](https://appshunter.io/ios/app/zbx-robot/id1457294950)

**Features:** macOS Compatibility

**In-app purchases:** none


### QY STEM

[App page](https://appshunter.io/ios/app/qy-stem/id6444227932)

This offline programming application is designed for competitive programming. It offers a dedicated environment for users to practice and prepare for coding competitions.

**Highlights:** Offline programming environment, Competition preparation, Dedicated coding practice, Supports multiple devices

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

**In-app purchases:** none


## Frequently asked questions

### Is ZBX robot free?

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

### Is QY STEM free?

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

### Do ZBX robot or QY STEM have ads?

Neither ZBX robot nor QY STEM shows ads.

### Which is updated more often, ZBX robot or QY STEM?

ZBX robot ships an update every 2 months, and QY STEM every 6 weeks. Most recently, ZBX robot was updated on September 14, 2026 and QY STEM on August 6, 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.*