Terms of Use

Last updated 25 August 2026

DeHum is an audio repair tool for iPhone and iPad, published by Bulpara Teknoloji Limited Şirketi. These terms cover what it does, what the subscription includes, and what it does not promise. By using the App you agree to them.

1. What DeHum does

DeHum looks for mains hum — the steady 50 Hz or 60 Hz drone that comes from power wiring, ground loops, dimmer switches and fluorescent fixtures — and removes it along with its harmonics. It works on audio files and on the audio inside video files, on your device, without a network connection.

2. What DeHum is not

It is a repair tool for one specific defect. It is not a general noise reducer, it does not remove hiss, rumble, room tone or wind, and it does not claim to return a damaged recording to the condition it would have had if it had been recorded properly.

3. Free and Premium

DeHum is free to download and use. The free tier repairs the first 30 seconds of a recording, at Standard depth, exported as M4A.

The free tier is limited by length, never by quality. Nothing DeHum exports is watermarked, on any tier, and the free export is the same fidelity as the paid one — it is simply shorter.

DeHum Premium adds recordings up to 60 minutes, the Gentle and Aggressive depth settings, repairing a video’s audio and putting it back with the picture untouched, WAV export, and batch processing.

4. Subscription terms

• DeHum Premium is offered as a monthly or an annual auto-renewing subscription. Prices are shown in the App in your local currency before you buy.
• The annual plan includes a 7-day free trial for new subscribers. If you have used a trial for this subscription before, you will be charged immediately.
• Payment is charged to your Apple Account at confirmation of purchase.
• The subscription renews automatically unless it is cancelled at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours of the end of the current period.
• You can manage or cancel your subscription in your Apple Account settings, or from Settings inside DeHum. Deleting the App does not cancel a subscription.
• Any unused portion of a free trial is forfeited when you buy a subscription.
• Refunds are handled by Apple, under Apple’s policies. We cannot issue them.
• Subscriptions are billed through the App Store and are subject to Apple’s terms.

5. Acceptable use

Use DeHum lawfully, and only on recordings you have the right to edit. Do not use it to alter an authenticated recording in order to misrepresent what was said, and do not attempt to work around the free tier’s limits or to reverse engineer the App.

6. Your recordings are yours

You keep every right you had in anything you import. DeHum claims no licence over it, and could not exercise one in any case: your audio never leaves your device. See the privacy policy.

7. Our side

The App, its design and its code belong to Bulpara Teknoloji Limited Şirketi. You get a limited, non-exclusive, non-transferable licence to use it for its intended purpose.

8. What DeHum does not promise

DeHum is provided as it is. Recordings vary enormously, and no processing can guarantee a particular result on a particular file — which is precisely why the App lets you hear the before and the after, side by side, before you export anything.

Any measurements published on this site were taken on a fixed set of test recordings, described where they appear. They are evidence about the method, not a prediction about your file.

Keep your originals. DeHum writes a new file and never modifies the recording you imported, but no software should be the only copy of anything you care about.

To the extent the law allows, Bulpara is not liable for lost recordings, lost work, or other indirect losses arising from using DeHum. Nothing here limits liability that cannot lawfully be limited.

9. Changes

These terms may change as the App changes. The date at the top says when they last did.

10. Contact

hello@bulpara.com, or through Support.