# QY STEM vs AIYonder

QY STEM and AIYonder 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.

QY STEM ships an update every 6 weeks, AIYonder every 5 weeks. The most recent releases landed on August 6, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | QY STEM | AIYonder |
| --- | --- | --- |
| 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 6 weeks | **Every 5 weeks** |
| Monetization | Free | — |
| Size | 137 MB | 55 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [广东群宇互动科技有限公司](https://appshunter.io/developer/1019985641) | [Guangzhou Qunyu Artificial Intelligence Technology Co., Ltd.](https://appshunter.io/developer/1868588963) |

## What reviewers say

### 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


### AIYonder

[App page](https://appshunter.io/ios/app/aiyonder/id6745245507)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is QY STEM free?

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

### Is AIYonder free?

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

### Do QY STEM or AIYonder have ads?

Neither QY STEM nor AIYonder shows ads.

### Which is updated more often, QY STEM or AIYonder?

QY STEM ships an update every 6 weeks, and AIYonder every 5 weeks. Most recently, QY STEM was updated on August 6, 2026 and AIYonder on September 14, 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.*