# 注册计量师易题库 vs SoundLab

The clearest difference is update cadence: SoundLab at fortnightly against 注册计量师易题库's every 7 months. SoundLab also leads on device support. 注册计量师易题库's advantage is iOS requirement (11 vs 15.6). On price and in-app purchases there is nothing between them.

Both are free to download. 注册计量师易题库 sells 4 one-off in-app purchases and SoundLab sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

注册计量师易题库 ships an update every 7 months, SoundLab fortnightly. The most recent releases landed on September 12, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | 注册计量师易题库 | SoundLab |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | — | No |
| Update frequency | Every 7 months | **Fortnightly** |
| Size | 43 MB | 20 MB |
| Requires iOS | **11** | 15.6 |
| Devices | — | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [红梅 李](https://appshunter.io/developer/1691801179) | [Shanghai Zhaoshi Technology Co., Ltd](https://appshunter.io/developer/1803512439) |

## What reviewers say

### 注册计量师易题库

[App page](https://appshunter.io/ios/app/2026/id6474110732)

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 注册计量师题库3个月会员 | $2.99 | one-time |
| 注册计量师题库9个月会员 | $3.99 | one-time |
| 注册计量师题库18个月会员 | $6.99 | one-time |
| 注册计量师题库24个月会员 | $12.99 | one-time |


### SoundLab

[App page](https://appshunter.io/ios/app/soundlab-audio-data-analyzer/id6751793537)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $2.99 | per month |
| Annual Membership | $19.99 | per year |


## Frequently asked questions

### Is 注册计量师易题库 free?

注册计量师易题库 is free to download, with in-app purchases available.

### Is SoundLab free?

SoundLab is free to download, with in-app purchases available.

### Which is updated more often, 注册计量师易题库 or SoundLab?

注册计量师易题库 ships an update every 7 months, and SoundLab fortnightly. Most recently, 注册计量师易题库 was updated on September 12, 2026 and SoundLab on September 24, 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.*