# SignalScope X vs Spectrolite

The clearest difference is review sentiment: Spectrolite at 83% against SignalScope X's 10%. Spectrolite also leads on rating (4.7 vs 3.0) and iOS requirement (15.6 vs 18.6). SignalScope X's advantage is update cadence (every 3 weeks vs every 8 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. SignalScope X sells 10 in-app purchases, starting at $3.49 per month and Spectrolite sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Spectrolite holds the better App Store score, 4.7 against 3.0. Both are backed by a comparable volume of ratings — 23 and 66 respectively. Written reviews point the same way: 10% of SignalScope X's written reviews are positive against 83% of Spectrolite's.

SignalScope X ships an update every 3 weeks, Spectrolite every 8 months. The most recent releases landed on November 10, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | SignalScope X | Spectrolite |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (23 ratings)](https://appshunter.io/ios/app/signalscope-x/id1304775893/reviews) | **[4.7 (66 ratings)](https://appshunter.io/ios/app/spectrolite/id1480240180/reviews)** |
| Number of ratings | 23 | **66** |
| Positive reviews | 10.2% of reviews | **83.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 8 months |
| Monetization | Freemium | Free with in-app purchases |
| Size | 19 MB | 1 MB |
| Requires iOS | 18.6 | **15.6** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Faber Acoustical, LLC](https://appshunter.io/developer/284781780) | [Waxing Wave](https://appshunter.io/developer/392942046) |

## 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


### Spectrolite

[App page](https://appshunter.io/ios/app/spectrolite/id1480240180)

This app visualizes sound in real-time using various spectrogram types. Explore detailed audio data with intuitive touch controls and adjustable parameters. An optional purchase unlocks advanced measurement tools.

**Highlights:** Real-time spectrogram visualization, Constant-Q, linear, and mel frequency scales, Full human hearing frequency range, Intuitive touch panning and zooming, Adjustable gain, Q, and other parameters, Pro version: grids, scales, spectrum view, tap-to-measure

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $4.99 | one-time |


## Frequently asked questions

### Is SignalScope X free?

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

### Is Spectrolite free?

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

### Which has better reviews, SignalScope X or Spectrolite?

Spectrolite is rated higher. SignalScope X averages 3.0 out of 5 from 23 ratings, while Spectrolite averages 4.7 from 66 ratings.

### Do SignalScope X or Spectrolite have ads?

Neither SignalScope X nor Spectrolite shows ads.

### Which is updated more often, SignalScope X or Spectrolite?

SignalScope X ships an update every 3 weeks, and Spectrolite every 8 months. Most recently, SignalScope X was updated on November 10, 2026 and Spectrolite on November 7, 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.*