Tone Generator Hz – tonal.fm

tonal.fm is a free tone generator app with 67 audio tools, no ads and no account. Play any frequency from 20 Hz to 20,000 Hz, fall asleep to brown noise with a sleep timer, test your speakers and hearing, and tune a guitar. Sound keeps playing with the screen off. WHY TONAL.FM • No ads, no account, no subscription • Works offline • Background playback with lock-screen controls • Microphone audio stays on your phone TONE GENERATOR Any frequency from 20 Hz to 20,000 Hz with sine, square, triangle and sawtooth waves. Turn the dial, hold the readout to type a number, or tap a preset. The readout shows the nearest musical note. SLEEP SOUNDS White, pink, brown, green, gray, blue and violet noise, plus fan, with a sleep timer. Playback continues in the background with play and pause from your lock screen. BINAURAL BEATS Preset beat frequencies for focus, relaxation and sleep, with headphones. TEST YOUR GEAR A high-frequency hearing check (8–20 kHz) for curiosity, not a medical test or diagnosis, a speaker test for left, right and phase, and Fix My Speaker, which plays a low tone to push water out of a phone speaker. HIGH-FREQUENCY TONES A dog whistle with three cadences and a mosquito tone. MUSIC A metronome with tap tempo and a microphone tuner for guitar and other instruments. FREE, NO ADS Every tool opens for free and there are no ads. One optional purchase, tonal.fm Pro, is a single payment (not a subscription) that unlocks: • an all-night sleep timer • every binaural preset • WAV or MP3 export of tones and test tones • hearing test history PRIVACY No account. The app sends anonymous usage events only. Microphone audio for the measuring tools is processed on your phone and never leaves it. Policy: https://www.tonal.fm/privacy The same tools are free in any browser at https://www.tonal.fm.