DeHum: Audio Hum Remover

The buzz under your recording has a name: mains hum. DeHum finds the 50 or 60 Hz hum and its harmonics and removes only those — so the voice, the guitar and the room stay exactly as you recorded them. Every repair runs on your iPhone. Nothing is uploaded, ever. ▸ WHAT DEHUM ACTUALLY FIXES The steady electrical drone from bad grounding, a cheap interface, a dimmer switch or fluorescent lights. • Ground loop hum — the low drone from a bad earth connection • 50 Hz and 60 Hz — found automatically, and both at once if your file has both • The harmonics too — 120, 180, 240 Hz and up, not just the fundamental • Hum that drifts — a wandering generator is tracked, not notched around ▸ IT SHOWS ITS WORK DeHum tells you what it found before it changes anything. • Spectrum view — every detected harmonic marked on the graph • A plain reading — "Found 60 Hz hum, 7 harmonics, −26 dB" • A/B toggle — both versions play the whole time, so switching never jumps • It says no — no mains hum, no change, and it tells you why ▸ WHY NOT JUST A NOISE REDUCER Broadband noise reduction treats a narrow defect as a wide one, and the voice pays for it. • Hum is a set of pure tones at known frequencies — DeHum subtracts those tones • Nothing else in the band is touched, so no underwater or robotic artefacts • A stationarity limit caps how much can be removed, so speech is not eaten • Gentle, Standard or Aggressive depth when you want to decide yourself ▸ ON YOUR DEVICE, FULL STOP No upload, no account, no sign-in, no server, no queue. • Works in airplane mode • Your recordings never leave your iPhone — our privacy label reads Data Not Collected • No per-file cost and no credits, because there is nothing to pay for • Import from Files, from Photos, or straight from the share sheet ▸ WHEN THE REPAIR IS DONE • M4A to share, or WAV for exactly what DeHum produced • Video in, video out — the picture is untouched, only the audio is repaired • Batch — hand it a session and each file is checked on its own • Everything lands in Files ▸ DeHum ▸ Exports, and in History ▸ FREE • Hum detection, the spectrum and the A/B on any file • The first 30 seconds repaired at full quality • The audio is never watermarked, on any tier — the free tier is capped by length, never by quality PREMIUM SUBSCRIPTION DeHum Premium is available with the following subscription options: Premium Monthly: $7.99/month Premium Annual: $39.99/year — includes 7-day free trial Premium unlocks full-length files instead of 30-second clips, Gentle/Standard/Aggressive depth control, repairing the audio inside a video, batch processing and WAV export. Payment will be charged to your Apple ID account at confirmation of purchase. Subscription automatically renews unless canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscriptions by going to your App Store account settings after purchase. Terms of Service: https://dehum.bulpara.com/terms Privacy Policy: https://dehum.bulpara.com/privacy Made by Bulpara. Questions: https://dehum.bulpara.com/support