# Decibel Meter Plus Pro vs CtrlF Pro

The clearest difference is price: CtrlF Pro at Free against Decibel Meter Plus Pro's $2.99. Decibel Meter Plus Pro's advantage is iOS requirement (15.0 vs 17). On update cadence, ads, in-app purchases and device support there is nothing between them.

CtrlF Pro is free to download; Decibel Meter Plus Pro costs $2.99 up front. Decibel Meter Plus Pro sells 1 one-off in-app purchase and CtrlF Pro sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Decibel Meter Plus Pro ships an update every 2 months, CtrlF Pro every 6 weeks. The most recent releases landed on October 14, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Decibel Meter Plus Pro | CtrlF Pro |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[3.8 (80 ratings)](https://appshunter.io/ios/app/decibel-meter-plus-pro/id645214476/reviews)** | — |
| Number of ratings | **80** | — |
| Positive reviews | 52.4% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | Paid | — |
| Size | 12 MB | 3 MB |
| Requires iOS | **15.0** | 17 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [华芳 张](https://appshunter.io/developer/586041482) | [贺 周](https://appshunter.io/developer/1815397078) |

## What reviewers say

### Decibel Meter Plus Pro

[App page](https://appshunter.io/ios/app/decibel-meter-plus-pro/id645214476)

Measure the sound levels around you with this utility app. It displays average, peak, and max values, offers decibel exposure time guidelines, and provides information on noise-induced hearing loss. The app also allows data recording and export for analysis.

**Highlights:** Measure sound levels, Display average, peak, and max values, Decibel exposure time guidelines, Information on noise-induced hearing loss, Record and export data, Calibrate measurements, Universal app support

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Reports | $4.99 | one-time |


### CtrlF Pro

[App page](https://appshunter.io/ios/app/ctrlf-pro/id6767729225)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CtrlF Pro | $4.99 | one-time |


## Frequently asked questions

### Is Decibel Meter Plus Pro free?

Decibel Meter Plus Pro costs $2.99, and also offers in-app purchases.

### Is CtrlF Pro free?

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

### Do Decibel Meter Plus Pro or CtrlF Pro have ads?

Neither Decibel Meter Plus Pro nor CtrlF Pro shows ads.

### Which is updated more often, Decibel Meter Plus Pro or CtrlF Pro?

Decibel Meter Plus Pro ships an update every 2 months, and CtrlF Pro every 6 weeks. Most recently, Decibel Meter Plus Pro was updated on October 14, 2026 and CtrlF Pro on October 5, 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.*