# Tone generator vs Signal Scope Studio

The clearest difference is ads: Signal Scope Studio at none against Tone generator's shown. Signal Scope Studio also leads on update cadence (every 9 days vs every 5 months). Tone generator's advantage is iOS requirement (12.0 vs 26.2). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Tone generator sells 3 one-off in-app purchases and Signal Scope Studio sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Tone generator ships an update every 5 months, Signal Scope Studio every 9 days. Both last shipped on September 17, 2026.

## The numbers

| Metric | Tone generator | Signal Scope Studio |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (152 ratings)](https://appshunter.io/ios/app/tone-generator/id457003837/reviews)** | — |
| Number of ratings | **152** | — |
| Positive reviews | 67.1% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 9 days** |
| Monetization | Free with in-app purchases | — |
| Size | 27 MB | 14 MB |
| Requires iOS | **12.0** | 26.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [michael heinz](https://appshunter.io/developer/292745639) | [Koji Hasegawa](https://appshunter.io/developer/1125823867) |

## What reviewers say

### Tone generator

[App page](https://appshunter.io/ios/app/tone-generator/id457003837)

Create various periodic signals with adjustable frequency and amplitude for testing electronic circuits or tuning instruments. Features include a metronome, a real-time tuner, and options for generating different noise types and tone sequences. It also offers unique features for hearing tests and party games.

**Highlights:** Generate periodic signals, Adjustable frequency and amplitude, Integrated instrument tuner, Metronome for practice, Hearing ability tests, Generate white/pink noise, Create tone sequences

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Extra-Feature 1 | $1.99 | one-time |
| No advertising | $1.99 | one-time |
| Upgrade to full version | $3.99 | one-time |

**What reviewers like**

- 🚀 Works every time!
- 🚀 Awesome application for generating tones and studying sound
- 👍 Very useful
- 👍 Genius
- 👍 Great app to make your tones

**What reviewers complain about**

- 🐛 Doesn't go lower than 10hz
- 🔍 Ruined by ads
- 🔍 Way too many ads
- 🔍 Crashes before I can export even though I paid for the feature
- 🔍 Fake app. Buying the upgrade doesn't do anything. There is no support. You can't export like it says you can. It's a scam.

**Reported bugs**

- Doesn't go lower than 10hz
- Crashes before I can export even though I paid for the feature
- Fake app. Buying the upgrade doesn't do anything. There is no support. You can't export like it says you can. It's a scam.
- app is modified
- No tone

**Requested features**

- Wish I had a manual  that explains a couple functions
- More precise way to select the frequency
- Playing of multiple tomes
- Manually enter a frequency
- More than one voice


### Signal Scope Studio

[App page](https://appshunter.io/ios/app/signal-scope-studio/id6801408561)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| WaveScope Full Access | $9.99 | one-time |


## Frequently asked questions

### Is Tone generator free?

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

### Is Signal Scope Studio free?

Signal Scope Studio is free to download, with in-app purchases available.

### Do Tone generator or Signal Scope Studio have ads?

Tone generator shows ads; Signal Scope Studio does not.

### Which is updated more often, Tone generator or Signal Scope Studio?

Tone generator ships an update every 5 months, and Signal Scope Studio every 9 days. Most recently, Tone generator was updated on September 17, 2026 and Signal Scope Studio on September 17, 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.*