# LD Atlas vs SmarterNoise Pro

The clearest difference is rating: LD Atlas at 5.0 against SmarterNoise Pro's 4.3. LD Atlas also leads on in-app purchases (none vs 4). SmarterNoise Pro's advantage is ratings volume (33 vs 4) and iOS requirement (12.0 vs 14.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. SmarterNoise Pro sells 4 one-off in-app purchases. LD Atlas asks for nothing beyond the download.

LD Atlas holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: SmarterNoise Pro has 33 ratings behind it against 4, so its average is the more settled of the two.

LD Atlas ships an update every 2 months, SmarterNoise Pro monthly. The most recent releases landed on October 2, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | LD Atlas | SmarterNoise Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/ld-atlas/id1458129589/reviews)** | [4.3 (33 ratings)](https://appshunter.io/ios/app/smarternoise-pro/id1466745030/reviews) |
| Number of ratings | 4 | **33** |
| Positive reviews | — | 28.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 219 MB | 24 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [PCB Piezotronics, Inc.](https://appshunter.io/developer/1049795372) | [Johan Rogard](https://appshunter.io/developer/1384299041) |

## What reviewers say

### LD Atlas

[App page](https://appshunter.io/ios/app/ld-atlas/id1458129589)

This application connects to specific noise dosimeters and vibration meters via Bluetooth or WiFi. It enables users to monitor meter status, perform calibrations, conduct measurements, and generate detailed PDF reports for analysis.

**Highlights:** Bluetooth/WiFi connectivity, Meter status monitoring, Calibration, Measurement execution, Data review, PDF report generation

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

**In-app purchases:** none


### SmarterNoise Pro

[App page](https://appshunter.io/ios/app/smarternoise-pro/id1466745030)

This advanced sound level meter app offers detailed audio analysis with features like frequency spectrum display and data export. It allows for precise sound measurements in both video and audio recording modes, with options for A-, C-, or no weighting.

**Highlights:** Sound level measurement in video/audio modes, Frequency spectrum display, Export measurement data (CSV), Sound level activated audio recording, Calibration tool, Full HD video recording (paid)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Camera upgrade | $0.99 | one-time |
| Frequency spectrum indicator | $1.99 | one-time |
| Video and audio recording | $1.99 | one-time |
| Spectrogram display | $1.99 | one-time |


## Frequently asked questions

### Is LD Atlas free?

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

### Is SmarterNoise Pro free?

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

### Which has better reviews, LD Atlas or SmarterNoise Pro?

LD Atlas is rated higher. LD Atlas averages 5.0 out of 5 from 4 ratings, while SmarterNoise Pro averages 4.3 from 33 ratings.

### Do LD Atlas or SmarterNoise Pro have ads?

Neither LD Atlas nor SmarterNoise Pro shows ads.

### Which is updated more often, LD Atlas or SmarterNoise Pro?

LD Atlas ships an update every 2 months, and SmarterNoise Pro monthly. Most recently, LD Atlas was updated on October 2, 2026 and SmarterNoise Pro on October 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.*