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Show one photo. Not your whole camera roll.

Three friends look at one phone together at a café table.

What to do

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

Put private photos in your vault

Importing puts a copy of each photo in your vault. The originals stay in the Photos app until you remove them.

  1. In Underlock, tap the Add button (a plus sign), then Import from Photos.
  2. Choose the photos you want in your vault.
  3. Keep Underlock open until the import finishes.
  4. When the import finishes, Underlock asks whether to remove the originals from the Photos app. Tap Remove.
  5. When iOS asks to delete the originals, confirm. The originals move to Recently Deleted in the Photos app.
  6. While the originals are in Recently Deleted, check that the photos are in your vault.
  7. To remove the originals for good, delete the originals from Recently Deleted. Until then, Recently Deleted keeps the originals for 30 days. After 30 days, the originals are gone for good.

When you show a photo

  1. Show a photo from the Photos app, which now holds only photos you’d show anyone. Inside your vault, a swipe shows the next photo or file.

Handing over your iPhone for more than one photo? See what to do before you hand over your iPhone.

What Underlock does

  • Asks before removing originals. After an import, Underlock asks whether to remove the originals from the Photos app.
  • A camera that skips your camera roll. Photos and videos you take in Underlock go straight into your vault.
  • Locks as you leave. By default, your vault locks the moment you leave Underlock, so switching to the Photos app locks your vault.

Questions people ask

Use Apple’s Guided Access, with Touch turned off. Your iPhone stays on the photo, and the screen ignores every swipe until you end the session. Or send the photo instead of handing over your iPhone.

The Hidden album may be enough. Hidden photos don’t appear in your library, so a swipe doesn’t reach them. But the Hidden album opens with Face ID, Touch ID or your iPhone passcode. If someone you hand your iPhone to knows your passcode, Underlock is the better choice. Your vault opens with a pattern you draw, not your passcode.

No. Photos in Underlock aren’t in the Photos app. Inside an open vault, though, a swipe shows the next photo or file, so lock your vault first.

No. Photos and videos you take in Underlock go straight into your vault. Nothing goes to the Photos app.

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.

Show one photo. Keep the rest private.

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