# 掌上岗亭 vs 注册计量师真题库

The clearest difference is update cadence: 掌上岗亭 at every 3 months against 注册计量师真题库's every 12 months. 掌上岗亭 also leads on iOS requirement (11.0 vs 13.0). 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.

掌上岗亭 ships an update every 3 months, 注册计量师真题库 every 12 months. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | 掌上岗亭 | 注册计量师真题库 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 12 months |
| Monetization | — | Free with in-app purchases |
| Size | 62 MB | 56 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Beijing CheWeiGuanJia Technology Co. Ltd.](https://appshunter.io/developer/1063910870) | [将军 黄](https://appshunter.io/developer/1745234400) |

## What reviewers say

### 掌上岗亭

[App page](https://appshunter.io/ios/app/id1582775591)

**Features:** macOS Compatibility

**In-app purchases:** none


### 注册计量师真题库

[App page](https://appshunter.io/ios/app/2025/id6738836183)

This app provides practice questions and mock exams for the Registered Metrologist qualification exam. It covers exam syllabi and official textbooks, offering daily exercises, topic-specific practice, and simulated test environments to help candidates prepare effectively.

**Highlights:** Daily practice tests, Topic-specific exercises, Past exam papers, Mock exam simulations, Exam syllabus coverage

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

**In-app purchases:** none


## Frequently asked questions

### Is 掌上岗亭 free?

掌上岗亭 is free to download, with no in-app purchases.

### Is 注册计量师真题库 free?

注册计量师真题库 is free to download, with no in-app purchases.

### Do 掌上岗亭 or 注册计量师真题库 have ads?

Neither 掌上岗亭 nor 注册计量师真题库 shows ads.

### Which is updated more often, 掌上岗亭 or 注册计量师真题库?

掌上岗亭 ships an update every 3 months, and 注册计量师真题库 every 12 months. Most recently, 掌上岗亭 was updated on November 7, 2026 and 注册计量师真题库 on October 30, 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.*