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Show your passport, not your camera roll

A traveller holds a closed Canadian passport and a black iPhone beside luggage.

What to do

Underlock is coming soon to the App Store. Here’s how it will work.

  1. Snap the card In your vault, tap Add, then Take photo or video. The photo goes straight into the vault.
  2. Bring in what you have For PDFs, tap Add, then Import from Files. For photos in your camera roll, tap Add, then Import from Photos.
  3. Clear the originals When the import finishes, Underlock asks whether to remove the originals. Tap Remove. The originals wait in Recently Deleted for 30 days, in the Photos or Files app, so delete them there too.
  4. Make a folder Group your documents in a folder, like Travel or Health, so your documents are easy to find.

What Underlock does

Search your vault by name, kind or folder: type "pass", or tap Documents. File names are encrypted too, so even a name like "passport.pdf" stays private.

  • Locks as you leave. Switch to another app, and your vault locks behind you, by default.
  • Share only what’s asked. Sending a document to someone? Underlock asks first, because a shared file leaves the vault.
  • No location on what you share. A photo you share from the vault leaves without its location, by default.

Questions people ask

Yes. Take a photo with the camera inside Underlock, or import a scan from the Files app. Each photo or scan is encrypted on your iPhone before it’s saved, and opens with your own pattern. A photo doesn’t replace the real passport or ID, so keep those too.

Yes. Import PDFs from the Files app, and the PDFs open inside your vault. Other kinds of documents open in Apple’s preview, from a temporary copy that Underlock deletes when you close the document.

You can type passwords into a note, and notes are encrypted like everything else. But Underlock isn’t a password manager: Underlock won’t fill in passwords for you. For logins, a password manager is the better tool.

For some things, yes. Apple’s Notes app can lock a note with your iPhone passcode or a separate Notes password. But Apple says a note with a PDF, audio or video can’t be locked. Underlock keeps PDFs, scans, photos and notes together, behind your own pattern.

Your iPhone’s own backup can bring your vault to a new iPhone, and your 12 words open your vault on that iPhone. With no backup at all, a lost iPhone means lost files.

Yes. Underlock is free forever: one vault, no file limit. If the free plan ever changes, you keep the plan you started with. More vaults come with Pro, Underlock’s paid plan.

Your documents, behind a lock of their own

Free for one vault, with no file limit. No account, no email.

For iPhone with iOS 17 or later.

Coming soon to the App Store

Get an email when Underlock launches

  • Lifetime Pro for $39.99 at launch, not $49.99.
  • Then news a few times a year.
  • Leave the list any time.

You’re on the list.

Underlock · hello@underlock.app