# Jima Caller ID vs 水務易 eWater

The clearest difference is in-app purchases: 水務易 eWater at none against Jima Caller ID's 3. 水務易 eWater also leads on ads (none vs shown) and update cadence (every 5 weeks vs every 3 months). Jima Caller ID's advantage is iOS requirement (12.0 vs 15.5). On price and device support there is nothing between them.

Both are free to download. Jima Caller ID sells 3 in-app purchases, starting at $0.99 per month. 水務易 eWater asks for nothing beyond the download.

Jima Caller ID ships an update every 3 months, 水務易 eWater every 5 weeks. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Jima Caller ID | 水務易 eWater |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (15 ratings)](https://appshunter.io/ios/app/jima-caller-id/id910656808/reviews)** | — |
| Number of ratings | **15** | — |
| Positive reviews | 62.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 5 weeks** |
| Monetization | Freemium | — |
| Size | 20 MB | 88 MB |
| Requires iOS | **12.0** | 15.5 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TechmaxApp](https://appshunter.io/developer/617391262) | [Water Supplies Department, HKSARG](https://appshunter.io/developer/790111274) |

## What reviewers say

### Jima Caller ID

[App page](https://appshunter.io/ios/app/jima-caller-id/id910656808)

This app helps Hong Kong users combat spam and scam calls by blocking unwanted numbers and identifying suspicious incoming calls. It utilizes a regularly updated database and allows users to contribute to its accuracy. The app also provides scam alerts and customizable blocking options.

**Highlights:** Block and identify incoming calls, Query spam call databases, Report spam calls, Whitelist and blacklist management, CSV import/export for lists, Customizable blocking actions, Automatic database updates

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month No Ads & Auto Update | $0.99 | per month |
| Half Year No Ads & Auto Update | $5.49 | per 6 months |
| Remove Popup Advertisement | $12.99 | one-time |


### 水務易 eWater

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

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

**In-app purchases:** none


## Frequently asked questions

### Is Jima Caller ID free?

Jima Caller ID is free to download, with in-app purchases available.

### Is 水務易 eWater free?

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

### Do Jima Caller ID or 水務易 eWater have ads?

Jima Caller ID shows ads; 水務易 eWater does not.

### Which is updated more often, Jima Caller ID or 水務易 eWater?

Jima Caller ID ships an update every 3 months, and 水務易 eWater every 5 weeks. Most recently, Jima Caller ID was updated on November 6, 2026 and 水務易 eWater on November 3, 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.*