# SoundMeter X vs CoucoPDF

The clearest difference is rating: CoucoPDF at 5.0 against SoundMeter X's 3.6. CoucoPDF also leads on monetization model (free vs free with in-app purchases) and iOS requirement (15.1 vs 18.6). SoundMeter X's advantage is ratings volume (45 vs 1) and update cadence (every 3 weeks vs every 2 months). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. SoundMeter X sells 7 in-app purchases, starting at $4.99 per month and CoucoPDF sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

CoucoPDF holds the better App Store score, 5.0 against 3.6. That said, the two scores are not equally well evidenced: SoundMeter X has 45 ratings behind it against 1, so its average is the more settled of the two.

SoundMeter X ships an update every 3 weeks, CoucoPDF every 2 months. The most recent releases landed on October 21, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | SoundMeter X | CoucoPDF |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.6 (45 ratings)](https://appshunter.io/ios/app/soundmeter-x/id1348050232/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/coucopdf/id6761065702/reviews)** |
| Number of ratings | **45** | 1 |
| Positive reviews | 22.6% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 18 MB | 46 MB |
| Requires iOS | 18.6 | **15.1** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Faber Acoustical, LLC](https://appshunter.io/developer/284781780) | [ALEJANDRO GONZALEZ DOPICO](https://appshunter.io/developer/1883537454) |

## What reviewers say

### SoundMeter X

[App page](https://appshunter.io/ios/app/soundmeter-x/id1348050232)

Transform your device into a professional sound level meter, noise dosimeter, and spectrum analyzer. Log data, calibrate sensitivity, and analyze audio with advanced features. Offers a free trial for premium functionalities.

**Highlights:** Handheld data-logging sound level meter, Data-logging noise dosimeter, Real-time octave spectrum analyzer, Multi-channel data recorder, Stereo signal generator, Sensitivity calibration, Data logging in CSV, TXT, MAT, and PDF

**Features:** Family Sharing, Apple Watch app

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SoundMeter Pro, 1 Month | $4.99 | per month |
| Pro Tool Set, 1 Month | $24.99 | per month |
| SoundMeter Pro, 1 Year | $49.99 | per year |
| Pro Tool Set, 1 Year | $249.99 | per year |
| 14-day Free Trial, SoundMeter Pro | Free | one-time |
| SoundMeter Pro 2026 Upgrade | $29.99 | one-time |
| SoundMeter Pro 2026 | $99.99 | one-time |


### CoucoPDF

[App page](https://appshunter.io/ios/app/coucopdf/id6761065702)

This app offers a comprehensive suite of tools for managing PDF documents, including scanning, signing, merging, editing, and annotating. It prioritizes user privacy by processing all data locally and provides a clean, intuitive interface for easy document control.

**Highlights:** Scan documents to PDF, Create and apply digital signatures, Merge and extract PDF pages, Edit and annotate PDFs, Organize and manage documents locally, Offline access to files

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Share & Print | $2.99 | one-time |


## Frequently asked questions

### Is SoundMeter X free?

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

### Is CoucoPDF free?

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

### Which has better reviews, SoundMeter X or CoucoPDF?

CoucoPDF is rated higher. SoundMeter X averages 3.6 out of 5 from 45 ratings, while CoucoPDF averages 5.0 from 1 ratings.

### Do SoundMeter X or CoucoPDF have ads?

Neither SoundMeter X nor CoucoPDF shows ads.

### Which is updated more often, SoundMeter X or CoucoPDF?

SoundMeter X ships an update every 3 weeks, and CoucoPDF every 2 months. Most recently, SoundMeter X was updated on October 21, 2026 and CoucoPDF on October 19, 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.*