Overtone Lab
Twenty exact audio tools in one app.
A precision calculation studio for audio engineers, musicians, and instrument builders — twenty exact tools in one app. Compute tempo and timing, SMPTE, pitch and harmonics, string tension, room acoustics, filters and crossovers, LUFS loudness, and more. Every formula is reference-validated.
What's inside
Tempo, SMPTE timecode, pitch & harmonics
Reverb, room modes, filters & crossovers
ITU-R BS.1770 LUFS loudness metering
Reference-validated · 100% offline & private
No account, no tracking, no data collection. Overtone Lab works fully offline.
Questions
Does Overtone Lab work offline?+
Yes. Overtone Lab runs entirely on your device, so it works with no internet connection.
Is there an account or subscription?+
No. There's no sign-up, no login, and no subscription — just download Overtone Lab from the App Store and open it.
What data does Overtone Lab collect?+
None. It collects, stores, and transmits zero personal data — nothing ever leaves your device.
Which devices are supported?+
Overtone Lab is available for iPhone, iPad & Mac.
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Get Overtone Lab
Twenty exact audio tools in one app. On-device, no account, no tracking.
Download on theApp Store