Signal Scope Studio
Dual Generator, Scope, FFT, dB
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
A dual-channel oscillator, output signal simulator, live microphone oscilloscope and spectrum analyzer, and stereo decibel meter—all in one app.
Signal Scope Studio combines a dual-channel oscillator, an output signal simulator, a live microphone oscilloscope and spectrum analyzer, and a stereo decibel meter in one audio toolkit.
DUAL SIGNAL GENERATOR
• Set sine, square, triangle, falling sawtooth, or white noise independently for LEFT and RIGHT
• Adjust frequency from 20 Hz to 20 kHz and volume from 0 to 100% with 270-degree dials. Frequency also supports numeric entry
• Adjust left and right frequency and volume independently, or link them while preserving the ratios at the time linking is enabled
• Output different frequencies from the left and right channels to produce beats and other effects
OUTPUT SIGNAL SIMULATOR
• Linearly sum LEFT + RIGHT internally and display the waveform and spectrum together
• Adjust Auto Trigger, freeze/resume, vertical and horizontal zoom, and refresh interval
• Control frequency range, spectrum sensitivity, and FFT resolution with dials or pinch and pan gestures
• Save high-resolution graphs with a dark navy background, white text, and green traces to Photos
WAVESCOPE
• Display the time-domain waveform and frequency spectrum of microphone input together in real time
• Use Auto Trigger, freeze display, pinch zoom, and a movable settings window
• Open Dual Signal Generator within the app and measure the actual sound emitted by the same device
DECIBEL METER
• Display relative microphone input levels on analog-style VU meters in real time
• Automatically detect stereo or mono input: two separate meters for the left and right channels in stereo, or one meter in mono
• Use PEAK indicators to spot brief sounds near the maximum input level
• Save a calibration offset to match a commercial decibel meter
MORE
• All features are available for seven days from the original download date. After the trial, Dual Signal Generator and Decibel Meter remain free to use; a one-time purchase lets you continue using WaveScope.
• Includes detailed offline manuals in Japanese, English, and French.
• Supports iPhone and iPad in portrait and landscape.
PLEASE NOTE
• Measurements depend on the device and environment.
• This app is intended for education, experiments, and general audio checks. It is not a substitute for calibrated instruments, certified sound-level meters, or medical devices.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
• Added Decibel Meter: stereo-capable analog decibel meters, PEAK indicators, and calibration against a reference meter
• Added French language support alongside Japanese and English
• Improved navigation across screens and the offline manuals
The developer, Koji Hasegawa, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Koji Hasegawa
- Size
- 14.7 MB
- Category
- Utilities
- Compatibility
Requires iOS 26.2 or later.
- iPhone
Requires iOS 26.2 or later. - iPad
Requires iPadOS 26.2 or later. - Mac
Requires macOS 26.2 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.2 or later.
- iPhone
- Languages
English and 2 more
- English, French, Japanese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- WaveScope Full Access $9.99
- Copyright
- © 2026 KOJI HASEGAWA