# SmarterNoise Pro vs Leaf.

The clearest difference is in-app purchases: Leaf. at none against SmarterNoise Pro's 4. Leaf. also leads on update cadence (every 4 days vs monthly). SmarterNoise Pro's advantage is iOS requirement (12.0 vs 16.6). On price, ads and device support there is nothing between them.

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

SmarterNoise Pro ships an update monthly, Leaf. every 4 days. The most recent releases landed on September 22, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | SmarterNoise Pro | Leaf. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (31 ratings)](https://appshunter.io/ios/app/smarternoise-pro/id1466745030/reviews)** | — |
| Number of ratings | **31** | — |
| Positive reviews | 28.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 24 MB | 49 MB |
| Requires iOS | **12.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Johan Rogard](https://appshunter.io/developer/1384299041) | [Paul Demangeat](https://appshunter.io/developer/1741825134) |

## What reviewers say

### 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 |


### Leaf.

[App page](https://appshunter.io/ios/app/leaf/id6740829690)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SmarterNoise Pro free?

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

### Is Leaf. free?

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

### Do SmarterNoise Pro or Leaf. have ads?

Neither SmarterNoise Pro nor Leaf. shows ads.

### Which is updated more often, SmarterNoise Pro or Leaf.?

SmarterNoise Pro ships an update monthly, and Leaf. every 4 days. Most recently, SmarterNoise Pro was updated on September 22, 2026 and Leaf. on October 9, 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.*