# 分贝测试仪 vs MellFlow

The clearest difference is in-app purchases: MellFlow at none against 分贝测试仪's 3. 分贝测试仪's advantage is iOS requirement (13.0 vs 16.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 分贝测试仪 sells 3 in-app purchases, starting at $9.99 per month. MellFlow asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 4 days. The most recent releases landed on September 11, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | 分贝测试仪 | MellFlow |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 days | Every 4 days |
| Size | 7 MB | 5 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [成 武](https://appshunter.io/developer/1727617638) | [Perumal Sanjay](https://appshunter.io/developer/1857968845) |

## What reviewers say

### 分贝测试仪

[App page](https://appshunter.io/ios/app/and/id6476977596)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月度会员 | $9.99 | per month |
| 季度会员 | $29.99 | per 3 months |
| 年度会员 | $39.99 | per year |


### MellFlow

[App page](https://appshunter.io/ios/app/mellflow/id6756016816)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 分贝测试仪 free?

分贝测试仪 is free to download, with in-app purchases available.

### Is MellFlow free?

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

### Do 分贝测试仪 or MellFlow have ads?

Neither 分贝测试仪 nor MellFlow shows ads.

### Which is updated more often, 分贝测试仪 or MellFlow?

分贝测试仪 ships an update every 4 days, and MellFlow every 4 days. Most recently, 分贝测试仪 was updated on September 11, 2026 and MellFlow on June 1, 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.*