# SignalScope X vs SmarterNoise Pro

The clearest difference is rating: SmarterNoise Pro at 4.3 against SignalScope X's 3.0. SmarterNoise Pro also leads on review sentiment (29% vs 10%) and iOS requirement (12.0 vs 18.6). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. SignalScope X sells 10 in-app purchases, starting at $3.49 per month and SmarterNoise Pro sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

SmarterNoise Pro holds the better App Store score, 4.3 against 3.0. Both are backed by a comparable volume of ratings — 23 and 33 respectively. Written reviews point the same way: 10% of SignalScope X's written reviews are positive against 29% of SmarterNoise Pro's.

SignalScope X ships an update every 3 weeks, SmarterNoise Pro monthly. The most recent releases landed on November 11, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | SignalScope X | SmarterNoise Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (23 ratings)](https://appshunter.io/ios/app/signalscope-x/id1304775893/reviews) | **[4.3 (33 ratings)](https://appshunter.io/ios/app/smarternoise-pro/id1466745030/reviews)** |
| Number of ratings | 23 | **33** |
| Positive reviews | 10.2% of reviews | **28.6% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Freemium | Free with in-app purchases |
| Size | 19 MB | 24 MB |
| Requires iOS | 18.6 | **12.0** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Faber Acoustical, LLC](https://appshunter.io/developer/284781780) | [Johan Rogard](https://appshunter.io/developer/1384299041) |

## What reviewers say

### SignalScope X

[App page](https://appshunter.io/ios/app/signalscope-x/id1304775893)

This app provides advanced signal analysis tools for acoustics, audio, and electronics. It offers a free oscilloscope and tiered subscriptions for additional measurement and visualization capabilities across iPhone, iPad, and Mac.

**Highlights:** Oscilloscope tool, FFT spectrum analysis, Real-time spectrograms, Data recording and export, Support for external hardware, Frequency response correction

**Features:** Family Sharing, Vision Pro support, iPhone Duo support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basic Tool Set, 1 Month | $3.49 | per month |
| Advanced Tool Set, 1 Month | $9.99 | per month |
| Pro Tool Set, 1 Month | $24.99 | per month |
| Basic Tool Set, 1 Year | $34.99 | per year |
| Advanced Tool Set, 1 Year | $99.99 | per year |
| Pro Tool Set, 1 Year | $249.99 | per year |
| 14-day Free Trial, Pro Tool Set | Free | one-time |
| Basic Tool Set 2026 | $69.99 | one-time |
| Advanced Tool Set 2026 | $199.99 | one-time |
| Pro Tool Set 2026 from Advanced | $309.99 | one-time |

**What reviewers like**

- 👍 Powerful software
- 👍 Good for professional testing
- 👍 Captures faint hums
- 👍 Works well for waveforms
- 👍 Useful for guitar debugging

**What reviewers complain about**

- 💸 Expensive subscription model
- 💸 High one-time purchase cost
- 💸 Perceived as a rip-off
- 💸 Previous purchases invalidated
- 💸 Lack of upgrade path

**Reported bugs**

- Recording starts and stops
- App crashes on launch
- Oscilloscope and FFT not functioning
- SPL meter inaccurate/uncalibratable
- App not working on older devices

**Requested features**

- Manual for better understanding
- Ability to store and retrieve setups
- One-off payment option
- More intuitive user interface
- Ability to change Y-axis scale


### 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 SignalScope X free?

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

### Is SmarterNoise Pro free?

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

### Which has better reviews, SignalScope X or SmarterNoise Pro?

SmarterNoise Pro is rated higher. SignalScope X averages 3.0 out of 5 from 23 ratings, while SmarterNoise Pro averages 4.3 from 33 ratings.

### Do SignalScope X or SmarterNoise Pro have ads?

Neither SignalScope X nor SmarterNoise Pro shows ads.

### Which is updated more often, SignalScope X or SmarterNoise Pro?

SignalScope X ships an update every 3 weeks, and SmarterNoise Pro monthly. Most recently, SignalScope X was updated on November 11, 2026 and SmarterNoise Pro on November 3, 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.*