# CellVkey vs 手持/在線ioT水質寶

The clearest difference is update cadence: CellVkey at every 4 weeks against 手持/在線ioT水質寶's every 2 months. 手持/在線ioT水質寶's advantage is iOS requirement (12.0 vs 15.4). 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.

CellVkey ships an update every 4 weeks, 手持/在線ioT水質寶 every 2 months. The most recent releases landed on September 8, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | CellVkey | 手持/在線ioT水質寶 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Every 2 months |
| Size | 18 MB | 75 MB |
| Requires iOS | 15.4 | **12.0** |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [NESTECH CORPORATION, LTD.](https://appshunter.io/developer/438677844) | [Ju Cheng Shih](https://appshunter.io/developer/1110051522) |

## What reviewers say

### CellVkey

[App page](https://appshunter.io/ios/app/cellvkey/id1437756843)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### 手持/在線ioT水質寶

[App page](https://appshunter.io/ios/app/iot/id1616121623)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CellVkey free?

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

### Is 手持/在線ioT水質寶 free?

手持/在線ioT水質寶 is free to download, with no in-app purchases.

### Do CellVkey or 手持/在線ioT水質寶 have ads?

Neither CellVkey nor 手持/在線ioT水質寶 shows ads.

### Which is updated more often, CellVkey or 手持/在線ioT水質寶?

CellVkey ships an update every 4 weeks, and 手持/在線ioT水質寶 every 2 months. Most recently, CellVkey was updated on September 8, 2026 and 手持/在線ioT水質寶 on September 21, 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.*