# Tone Generator vs Signal Scope Studio

The clearest difference is in-app purchases: Tone Generator at none against Signal Scope Studio's 1. Tone Generator also leads on iOS requirement (17.6 vs 26.2). Signal Scope Studio's advantage is ads (none vs shown). On price, update cadence and device support there is nothing between them.

Both are free to download. Signal Scope Studio sells 1 one-off in-app purchase. Tone Generator asks for nothing beyond the download.

Tone Generator ships an update every 2 weeks, Signal Scope Studio every 9 days. The most recent releases landed on October 16, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Tone Generator | Signal Scope Studio |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Every 9 days** |
| Size | 5 MB | 14 MB |
| Requires iOS | **17.6** | 26.2 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Eiji Chiba](https://appshunter.io/developer/1818574673) | [Koji Hasegawa](https://appshunter.io/developer/1125823867) |

## What reviewers say

### Tone Generator

[App page](https://appshunter.io/ios/app/tone-generator/id6746802859)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 no in-app purchases.

### 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 2 weeks, and Signal Scope Studio every 9 days. Most recently, Tone Generator was updated on October 16, 2026 and Signal Scope Studio on October 4, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*