# SignalScope X vs Sound Level & Spectrogram

The clearest difference is review sentiment: Sound Level & Spectrogram at 100% against SignalScope X's 10%. Sound Level & Spectrogram also leads on in-app purchases (none vs 12). SignalScope X's advantage is ads (none vs shown) and update cadence (every 3 weeks vs every 5 months). On price and iOS requirement there is nothing between them.

Both are free to download. SignalScope X sells 12 in-app purchases, starting at $3.49 per month. Sound Level & Spectrogram asks for nothing beyond the download.

SignalScope X ships an update every 3 weeks, Sound Level & Spectrogram every 5 months. The most recent releases landed on October 26, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | SignalScope X | Sound Level & Spectrogram |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (23 ratings)](https://appshunter.io/ios/app/signalscope-x/id1304775893/reviews)** | — |
| Number of ratings | **23** | — |
| Positive reviews | 10.2% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 3 weeks** | Every 5 months |
| Monetization | Freemium | **Ad-supported** |
| Size | 19 MB | 4 MB |
| Requires iOS | **18.6** | 18.7 |
| Devices | **iPhone, iPad, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Faber Acoustical, LLC](https://appshunter.io/developer/284781780) | [TOON,LLC](https://appshunter.io/developer/633948723) |

## What reviewers say

### SignalScope X

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

This app provides powerful measurement and analysis tools for acoustics, audio, and electronics. It offers a free oscilloscope and subscription-based tool sets for basic, advanced, and professional needs, compatible across iPhone, iPad, and Mac.

**Highlights:** Oscilloscope, FFT Analyzer, Spectrogram Analyzer, Data Recorder, Sound Intensity Analyzer, Room Acoustics Analyzer

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

**In-app purchases (12)**

| 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 |
| Advanced Tool Set 2026 from Basic | $219.99 | one-time |
| Pro Tool Set 2026 from Advanced | $309.99 | one-time |
| Pro Tool Set 2026 from Basic | $439.99 | 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


### Sound Level & Spectrogram

[App page](https://appshunter.io/ios/app/sound-level-and-spectrogram/id6503722682)

Measure sound levels in decibels and visualize sound frequencies with a real-time spectrogram. Understand your environment's noise and protect your health. Offers advanced settings for accurate acoustic analysis.

**Highlights:** Sound level measurement (dB), Real-time spectrogram analysis, Frequency weighting correction (A, C, Z), Time weighting characteristics (Fast, Slow), Time course graph, Environmental noise measurement

**In-app purchases:** none


## Frequently asked questions

### Is SignalScope X free?

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

### Is Sound Level & Spectrogram free?

Sound Level & Spectrogram is free to download, with no in-app purchases.

### Do SignalScope X or Sound Level & Spectrogram have ads?

Sound Level & Spectrogram shows ads; SignalScope X does not.

### Which is updated more often, SignalScope X or Sound Level & Spectrogram?

SignalScope X ships an update every 3 weeks, and Sound Level & Spectrogram every 5 months. Most recently, SignalScope X was updated on October 26, 2026 and Sound Level & Spectrogram on October 23, 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.*