# Spectrolite vs ToneScope

The clearest difference is in-app purchases: ToneScope at none against Spectrolite's 1. ToneScope also leads on update cadence (every 10 days vs every 8 months) and rating (5.0 vs 4.8). Spectrolite's advantage is ratings volume (51 vs 4) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Spectrolite sells 1 one-off in-app purchase. ToneScope asks for nothing beyond the download.

ToneScope holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Spectrolite has 51 ratings behind it against 4, so its average is the more settled of the two.

Spectrolite ships an update every 8 months, ToneScope every 10 days. The most recent releases landed on October 9, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Spectrolite | ToneScope |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (51 ratings)](https://appshunter.io/ios/app/spectrolite/id1480240180/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/tonescope/id6757265327/reviews)** |
| Number of ratings | **51** | 4 |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 10 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 1 MB | 2 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Waxing Wave](https://appshunter.io/developer/392942046) | [Newton Niu](https://appshunter.io/developer/6777603868) |

## What reviewers say

### 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

**In-app purchases (1)**

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


### ToneScope

[App page](https://appshunter.io/ios/app/tonescope/id6757265327)

This audio analysis tool offers real-time and offline sound signal processing. It utilizes a multirate FFT for high frequency resolution and efficiency on iOS devices. All data processing is done locally, ensuring user privacy.

**Highlights:** Real-time audio analysis, Offline sound signal analysis, Multirate FFT processing, High frequency resolution, On-device processing, Local audio recording

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

**In-app purchases:** none


## Frequently asked questions

### Is Spectrolite free?

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

### Is ToneScope free?

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

### Which has better reviews, Spectrolite or ToneScope?

ToneScope is rated higher. Spectrolite averages 4.8 out of 5 from 51 ratings, while ToneScope averages 5.0 from 4 ratings.

### Do Spectrolite or ToneScope have ads?

Neither Spectrolite nor ToneScope shows ads.

### Which is updated more often, Spectrolite or ToneScope?

Spectrolite ships an update every 8 months, and ToneScope every 10 days. Most recently, Spectrolite was updated on October 9, 2026 and ToneScope on October 2, 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.*