Generate precise audio tones from 20 Hz to 20 kHz. Sine, square, and sawtooth waves for testing, calibration, and tuning.
Tone Generator+ Freq produces precise audio tones at any frequency you choose. Generate sine, square, sawtooth, and triangle waveforms for testing, calibration, tuning, and audio experiments.
Set your desired frequency with a precise slider or type the exact Hz value. Adjust volume and select from multiple waveform types. The app generates clean, stable audio signals through your iPhone speaker or connected audio output.
Ideal for speaker testing, audio equipment calibration, musical instrument tuning, science experiments, hearing range testing, and sound therapy. Sweep through frequency ranges to test audio equipment response.
Professional-grade signal generation in a simple interface. Supports the full audible range from 20 Hz to 20,000 Hz with smooth, glitch-free output at any frequency.
Ratings & Reviews
5.0
out of 5
1 Ratings
The tone now keeps playing when you leave the app. Start a masking tone and switch to your browser or mail — it stays on. Requested in a review by someone using it for tinnitus; thank you.
Version 1.0.25
The developer, Kyu-Hee Jang, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
Identifiers
Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
Identifiers
Usage Data
Diagnostics
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
Kyu-Hee Jang
Size
71.8 MB
Category
Utilities
Compatibility
Requires iOS 17.0 or later.
iPhone Requires iOS 17.0 or later.
Mac Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
