About this app
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.
Latest release
What’s New
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.
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Aug 18, 2026 · 2:58 AM Free
Screenshots
