# o46scope — Oscilloscope,FFT&ToneGenerator

> Oscilloscope,FFT&ToneGenerator (iPhone/iPad app by Shinsuke Tsutsui.)

- Source: https://appshunter.io/ios/app/o46scope/id6754371407 (this page in markdown: same URL + `.md`)
- Developer: [Shinsuke Tsutsui](https://appshunter.io/developer/1707110915)
- Category: Utilities, Music
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 13.0 · 53 MB
- Languages: English, Japanese
- Released: 2025-10-27
- Data updated: 2026-06-07
- User reviews in markdown: https://appshunter.io/ios/app/o46scope/id6754371407/reviews.md

## What is o46scope?

o46scope is an audio measurement app for iPhone and iPad that helps you visualize sound in real time.

It supports oscilloscope and FFT spectrum display, allowing you to inspect waveforms and frequency components instantly.

The app also supports internal signal generation with Tone1 / Tone2 and test signal (Beep) output, making it useful for quick checks, learning, and simple audio measurement tasks.

Key features
• Oscilloscope display
• FFT spectrum display
• Signal tab for signal control
• Internal signal generation with Tone1 / Tone2
• Speaker output for tones
• Test signal (Beep) output
• Adjustable parameters

Premium
Tone1 / Tone2 internal signal generation is available as a premium feature.
It is available without ads.

Ideal for users who want waveform visualization, frequency analysis, and signal generation in one app.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Premium | $19.99 | per year |



## Version history (last 4 releases)

### 4.0 — 2026-04-24

· Ads have been added
· Premium subscribers enjoy an ad-free experience
· You can now participate in a survey from the Settings screen

### 3.0 — 2026-03-25

What’s new in version 3.0

• Redesigned the Signal tab for easier signal control
• Added internal signal generation for Tone1 / Tone2
• Added speaker output for tones
• Improved responsiveness and colors in Signal controls
• Added premium purchase / restore support for Tone1 / Tone2
• Updated the app icon
• Improved overall stability

### 2.0 — 2025-12-09

• Improved session mode for more stable performance
• Added waveform and level meter color display options
• Added a high-pass filter (70Hz cutoff) to reduce low-frequency noise
• Added a notch filter to suppress power-line noise
• Added a simple white-noise reduction feature
• Added a settings reset option for quick restoration to defaults
• Added selectable vertical scale magnification for waveform display

### 1.0 — 2025-10-28

No release notes.

## More apps by Shinsuke Tsutsui

- [Kirakira Sticker Camera : AI](https://appshunter.io/ios/app/kirakira-sticker-camera-ai/id6753842647)
- [Tappable OCR](https://appshunter.io/ios/app/tappable-ocr/id6754961091)
- [Split PDF Easy](https://appshunter.io/ios/app/split-pdf-easy/id6760335959)

All apps by Shinsuke Tsutsui: https://appshunter.io/developer/1707110915

## Related topics

[o46scope](https://appshunter.io/ios/topics/o46scope)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-07.*