# Eco Engineer vs Chi Hang Management

The clearest difference is device support: Chi Hang Management at 3 against Eco Engineer's —. Chi Hang Management also leads on iOS requirement (11.0 vs 13.0). On price 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.

## The numbers

| Metric | Eco Engineer | Chi Hang Management |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | — | No |
| Size | 41 MB | 52 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | — | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [ARES (HK) TECHNOLOGIES LIMITED](https://appshunter.io/developer/1780464045) | [Surmount Development (HK) Co., Limited](https://appshunter.io/developer/1798183674) |

## What reviewers say

### Eco Engineer

[App page](https://appshunter.io/ios/app/eco-engineer/id6474374357)

**In-app purchases:** none


### Chi Hang Management

[App page](https://appshunter.io/ios/app/chi-hang-management/id6745811730)

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

**In-app purchases:** none


## Frequently asked questions

### Is Eco Engineer free?

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

### Is Chi Hang Management free?

Chi Hang Management is free to download, with no in-app purchases.

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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.*