Tone Generator
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50+
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Everyone
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About this app
Tone Generator — Pure, Precise Audio Signals
Generate clean test signals from 20 Hz to 20 kHz directly on your phone: steady tones, noise and sweeps. A minimalist instrument for musicians, sound engineers, students, and anyone who needs a reliable signal source on the go.
TONES
• 20 Hz to 20 000 Hz on a logarithmic slider, with ±1 Hz buttons and direct entry for exact values
• Three waveforms — Sine (pure tone), Square (rich harmonics), Triangle (warm timbre)
• Musical note display — shows the closest note (A4, C♯5, and so on)
• Quick presets for 432, 440, 528 Hz and 1 kHz, plus your own pinned frequencies
NOISE
• White, pink and brown noise, generated continuously — never a looping sample
SWEEPS
• Glide between two frequencies over 5 to 120 seconds
• Linear or logarithmic, one-shot or looping
• The readout follows the signal as it runs
BUILT FOR REAL WORK
• Route the signal to the left speaker, the right, or both — test one channel at a time
• Keep the screen on so a measurement is never cut short
• Auto-stop after 5, 15, 30 or 60 minutes
• Pauses for calls and stops when headphones are unplugged, so a pure tone never lands in your ears at full volume
• Dark and light themes, tablet layout, 14 languages
AUDIO ENGINEERING
• Band-limited synthesis using PolyBLEP and PolyBLAMP — no harsh aliasing artefacts
• The device's native sample rate, so nothing is resampled on the way out
• Waveforms matched for equal loudness: changing shape changes timbre, not level
• Every transition — start, stop, sweep seam — is ramped, so there are no clicks
HEARING SAFETY
Pure tones concentrate all their energy on one frequency and feel deceptively quiet. The app opens with a short safety notice and keeps it one tap away.
This app is not a medical device.
Made by KirsuLab LLC.
Generate clean test signals from 20 Hz to 20 kHz directly on your phone: steady tones, noise and sweeps. A minimalist instrument for musicians, sound engineers, students, and anyone who needs a reliable signal source on the go.
TONES
• 20 Hz to 20 000 Hz on a logarithmic slider, with ±1 Hz buttons and direct entry for exact values
• Three waveforms — Sine (pure tone), Square (rich harmonics), Triangle (warm timbre)
• Musical note display — shows the closest note (A4, C♯5, and so on)
• Quick presets for 432, 440, 528 Hz and 1 kHz, plus your own pinned frequencies
NOISE
• White, pink and brown noise, generated continuously — never a looping sample
SWEEPS
• Glide between two frequencies over 5 to 120 seconds
• Linear or logarithmic, one-shot or looping
• The readout follows the signal as it runs
BUILT FOR REAL WORK
• Route the signal to the left speaker, the right, or both — test one channel at a time
• Keep the screen on so a measurement is never cut short
• Auto-stop after 5, 15, 30 or 60 minutes
• Pauses for calls and stops when headphones are unplugged, so a pure tone never lands in your ears at full volume
• Dark and light themes, tablet layout, 14 languages
AUDIO ENGINEERING
• Band-limited synthesis using PolyBLEP and PolyBLAMP — no harsh aliasing artefacts
• The device's native sample rate, so nothing is resampled on the way out
• Waveforms matched for equal loudness: changing shape changes timbre, not level
• Every transition — start, stop, sweep seam — is ramped, so there are no clicks
HEARING SAFETY
Pure tones concentrate all their energy on one frequency and feel deceptively quiet. The app opens with a short safety notice and keeps it one tap away.
This app is not a medical device.
Made by KirsuLab LLC.
Tones, noise and sweeps, 20 Hz to 20 kHz. Sine, square, triangle. Test L or R.
Updated on
Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
What’s new
• Range now reaches 20 kHz, up from 2 kHz
• New: white, pink and brown noise
• New: frequency sweeps, linear or logarithmic, one-shot or looping
• Send the signal to the left channel, the right, or both
• Keep the screen on, and auto-stop after a set time
• Pauses for calls; stops when headphones are unplugged
• Send feedback from inside the app
• Now in 14 languages
• New: white, pink and brown noise
• New: frequency sweeps, linear or logarithmic, one-shot or looping
• Send the signal to the left channel, the right, or both
• Keep the screen on, and auto-stop after a set time
• Pauses for calls; stops when headphones are unplugged
• Send feedback from inside the app
• Now in 14 languages
Everyone
Learn moreApp support
phone
Phone number
+16507744866
About the developer
KirsuLab LLC
hello@kirsulab.com
2108 N St Pmb 16239
Sacramento, CA 95816-5712
United States
+1 650-774-4866
