# SizeChina vs StoichioAI

The clearest difference is update cadence: StoichioAI at weekly against SizeChina's every 60 months. SizeChina's advantage is iOS requirement (12.0 vs 17.1). 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.

SizeChina ships an update every 60 months, StoichioAI weekly. The most recent releases landed on November 3, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | SizeChina | StoichioAI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 60 months | **Weekly** |
| Size | 23 MB | 27 MB |
| Requires iOS | **12.0** | 17.1 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Apps Resource Centre, Hong Kong Baptist University](https://appshunter.io/developer/1375410542) | [Pang Ka Wai](https://appshunter.io/developer/797633008) |

## What reviewers say

### SizeChina

[App page](https://appshunter.io/ios/app/sizechina/id1481186588)

**Features:** macOS Compatibility

**In-app purchases:** none


### StoichioAI

[App page](https://appshunter.io/ios/app/stoichioai/id6755667893)

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

**In-app purchases:** none


## Frequently asked questions

### Is SizeChina free?

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

### Is StoichioAI free?

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

### Do SizeChina or StoichioAI have ads?

Neither SizeChina nor StoichioAI shows ads.

### Which is updated more often, SizeChina or StoichioAI?

SizeChina ships an update every 60 months, and StoichioAI weekly. Most recently, SizeChina was updated on November 3, 2026 and StoichioAI on October 25, 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.*