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Privacy Policy — Tightcut

Revised 6 October 2026

This is Naruberio LLC's account of what becomes of information when you use Tightcut, our iPhone app for cutting the pauses out of recordings.

Put simply, all of it happens on your iPhone. Tightcut has no sign-in, Naruberio runs no server for it, and it never goes online. Reading your video, analysing it and writing the result are all done on the phone. Since the app sends us nothing, nothing from it sits with us that could leak, be sold, or be demanded from us.

The path a clip takes

Choosing it

There are two ways in. With Choose from Photos, Apple's picker runs outside Tightcut and passes over only the video you tapped, so the app never sees anything else in your library; Tightcut then copies that one video into a temporary folder of its own in order to read it. With Choose from Files, the file is read where it already is and no copy is made. A picture you pick to sit behind a person reaches the app through the same Apple picker, one picture at a time.

If what you pick is kept in iCloud and is not yet on the phone, iOS may download it before handing it over. That download is done by iOS; Tightcut itself sends nothing.

Working on it

• Finding the silence. Tightcut tracks how loud the sound is over time, on the phone. It does not convert speech to text, pick out words, or work out who is speaking.
• Changing the background. People are located by Apple's Vision framework, which runs on the device. With the green-screen option, the background is picked out by its colour instead. No frame is sent anywhere, and no picture is used to train anything.
• Playing it backwards. The frames and the sound are rewritten in reverse order on the phone.

Whatever you switch on runs as one export on your iPhone. Nothing waits in a queue elsewhere, nothing is uploaded, and nothing is processed remotely.

Files left on the phone

• During an export, in-between files go into Tightcut's temporary folder. They are deleted once the export ends, whether it worked or not.
• The copy taken from Photos stays in that folder while you are working on the clip, and is deleted when you open another clip or tap Start over — and at the latest the next time Tightcut starts.
• The finished video moves to Tightcut's Application Support folder so that you can save or share it. Only the newest one is kept; it is left out of device backups and is deleted when you tap Start over or export again.
• Each time Tightcut starts, it empties its temporary folder and removes any finished video from the last session, in case the app was stopped part-way.
• Nothing is synced through iCloud.

Getting the result out

Save to Photos is the only step that needs a permission, and iOS asks for it only when you tap that button. Tightcut asks for add-only access: it can place a new video in your library but cannot read what is there. Saying no is fine — Share and Save to Files work with no permission at all.

Tightcut never asks for the camera, the microphone, contacts, location, Health or Bluetooth.

What the app sends Naruberio: nothing

Tightcut collects no personal information. Going through it type by type:

• Your name, email address or other contact details — not collected: there is no account to create.
• Videos, sound, pictures and files — not collected: they are handled on the phone and never sent.
• Location — not collected: no feature uses it.
• Identifiers for your device or for advertising — not collected: there is no tracking and no advertising.
• Usage statistics and crash reports — not collected: no analytics or crash-reporting kit is built in.

Tightcut's App Privacy section on the App Store reads “Data Not Collected”, and the privacy manifest shipped inside the app (PrivacyInfo.xcprivacy) declares the same. Tightcut follows no one around, so iOS never puts the App Tracking Transparency question to you on its behalf.

Interfaces Apple asks us to explain

For a handful of system interfaces, Apple wants each app to state why it uses them. Tightcut states two, and uses both only on the phone:

Other companies

No outside software kit is built into Tightcut: no analytics (Google Analytics, Firebase or anything similar), no ad network, and no crash-reporting service. The app sends no network request of any kind. The two links in Settings, to this policy and to the terms, open in your web browser when tapped; the browser loads those pages, not Tightcut.

For the app itself, the one company involved is Apple, which runs the App Store you buy Tightcut through and takes the payment. Your card details stay with Apple — they are never shown to us. That purchase falls under Apple's own privacy policy: https://www.apple.com/legal/privacy/

Tightcut is paid for once, up front. There is nothing to buy inside it, no subscription, and no advertising.

Younger users

Tightcut is not made for children. It does not knowingly gather personal information from anybody, children included.

Requests about your data (GDPR, CCPA, APPI)

You might ask us to show, correct, hand over or erase data about you. We receive no data about you through the app, so as far as the app goes, such a request has nothing to act on.

What Tightcut keeps is on your phone, in your hands. Deleting the app deletes all of it from the phone.

If you write to us by email, that is separate from the app: your message and address stay in our inbox so that we can reply. Ask, and we will show you what we have kept, correct it, hand it over, or delete it. That inbox is a Gmail account, so the message is also held on Google's servers and falls under Google's own privacy policy: https://policies.google.com/privacy

If this policy is updated

When the law or Tightcut changes, this policy may be revised. The revision date at the top will change, and any important change will be pointed out on this page.

Writing to us

Naruberio LLC (合同会社ナルベリオ) — konpei.work@gmail.com