# 水務易 eWater vs eTAX by IRD

The clearest difference is update cadence: 水務易 eWater at every 5 weeks against eTAX by IRD's every 8 months. eTAX by IRD's advantage is 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 every 5 weeks, eTAX by IRD every 8 months. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | 水務易 eWater | eTAX by IRD |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 8.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 8 months |
| Monetization | — | Free |
| Size | 88 MB | 30 MB |
| Requires iOS | 15.5 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Water Supplies Department, HKSARG](https://appshunter.io/developer/790111274) | [Inland Revenue Department](https://appshunter.io/developer/1703960168) |

## 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


### eTAX by IRD

[App page](https://appshunter.io/ios/app/etax-by-ird/id6475290060)

Manage your tax affairs conveniently and securely from your mobile device. Access important tax messages, personal information, and a direct link to the IRD's online tax portal for services like e-filing and document stamping.

**Highlights:** Secure login with iAM Smart and biometrics, View real-time tax messages and alerts, Access Individual Tax Portal, E-filing of tax returns, E-Stamping of documents

**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 eTAX by IRD free?

eTAX by IRD is free to download, with no in-app purchases.

### Do 水務易 eWater or eTAX by IRD have ads?

Neither 水務易 eWater nor eTAX by IRD shows ads.

### Which is updated more often, 水務易 eWater or eTAX by IRD?

水務易 eWater ships an update every 5 weeks, and eTAX by IRD every 8 months. Most recently, 水務易 eWater was updated on November 3, 2026 and eTAX by IRD on November 4, 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.*