# 水務易 eWater vs 傳播光

The clearest difference is update cadence: 傳播光 at every 2 days against 水務易 eWater's monthly. 傳播光 also leads on iOS requirement (13.0 vs 15.5). 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.

水務易 eWater ships an update monthly, 傳播光 every 2 days. The most recent releases landed on September 30, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | 水務易 eWater | 傳播光 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 days** |
| Size | 87 MB | 276 MB |
| Requires iOS | 15.5 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Water Supplies Department, HKSARG](https://appshunter.io/developer/790111274) | [Zhongyifeng Information Technology (Suzhou) Co., Ltd.](https://appshunter.io/developer/1561899180) |

## What reviewers say

### 水務易 eWater

[App page](https://appshunter.io/ios/app/ewater/id6449998378)

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

**In-app purchases:** none


### 傳播光

[App page](https://appshunter.io/ios/app/lightmesh-app/id6781610489)

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

**In-app purchases:** none


## Frequently asked questions

### Is 水務易 eWater free?

水務易 eWater is free to download, with no in-app purchases.

### Is 傳播光 free?

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

### Do 水務易 eWater or 傳播光 have ads?

Neither 水務易 eWater nor 傳播光 shows ads.

### Which is updated more often, 水務易 eWater or 傳播光?

水務易 eWater ships an update monthly, and 傳播光 every 2 days. Most recently, 水務易 eWater was updated on September 30, 2026 and 傳播光 on October 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.*