# ToneScope vs SLView

The clearest difference is update cadence: ToneScope at every 10 days against SLView's every 2 months. SLView's advantage is device support (3 vs 1) and iOS requirement (15.6 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ToneScope ships an update every 10 days, SLView every 2 months. The most recent releases landed on October 2, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | ToneScope | SLView |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/tonescope/id6757265327/reviews)** | — |
| Number of ratings | **4** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 2 months |
| Monetization | Free | — |
| Size | 2 MB | 15 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Newton Niu](https://appshunter.io/developer/6777603868) | [Hangzhou Shunli Optotech Co.,Ltd](https://appshunter.io/developer/6778368459) |

## What reviewers say

### 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


### SLView

[App page](https://appshunter.io/ios/app/slview/id6778368457)

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

**In-app purchases:** none


## Frequently asked questions

### Is ToneScope free?

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

### Is SLView free?

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

### Do ToneScope or SLView have ads?

Neither ToneScope nor SLView shows ads.

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

ToneScope ships an update every 10 days, and SLView every 2 months. Most recently, ToneScope was updated on October 2, 2026 and SLView on October 4, 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.*