FourThirtyTwo

FourThirtyTwo is a native iPhone and iPad app that retunes audio to 432 Hz — or any reference pitch you choose. Import a track, compare the original and retuned sound while it plays, then create a pitch-shifted copy you can keep, save, or share. Nothing is uploaded. There are no accounts, ads, analytics, or servers behind the app. ONE PURCHASE. NO SUBSCRIPTIONS Pay once for the app. There is no subscription and no in-app purchase required to unlock its audio tools. NATIVE, ON-DEVICE PERFORMANCE Built for iPhone and iPad with Apple’s native audio and interface frameworks. Processing stays on your device for responsive preview and conversion without an internet connection. LISTEN BEFORE YOU CONVERT Flip between original and retuned playback while the track plays. Scrub the waveform, skip around, and decide with your ears before creating a new file. SOURCE TUNING YOU CONTROL Each import…