Works for Photo 3D whether or not it has its own passcode. No download needed.
Touch and hold Photo 3D's icon, tap Require Face ID, then confirm. On iOS 18 and later that puts Photo 3D behind Face ID, Touch ID or your passcode; choose Hide and Require Face ID instead to move it into App Library's Hidden folder as well.
Lock Photo 3D with Face ID
- Find Photo 3D on your Home Screen or in App Library.
- Touch and hold the icon until the quick-actions menu opens.
- Tap Require Face ID (or Require Touch ID / Require Passcode, depending on your iPhone).
- Tap Require Face ID again to confirm. Photo 3D now asks for authentication every time it opens.
To test it, close Photo 3D from the App Switcher and open it again. You should see the Face ID prompt before any content appears.
Hide Photo 3D in App Library
- Touch and hold Photo 3D's icon and tap Require Face ID.
- Choose Hide and Require Face ID instead of Require Face ID.
- Confirm. The icon leaves your Home Screen and moves to the Hidden folder at the bottom of App Library.
- To open it later, swipe to App Library, tap Hidden and authenticate.
Hiding also locks the app. To undo either, touch and hold the icon again and choose Don't Require Face ID.
Why lock Photo 3D?
Photo 3D is a photo manager, the kind of app that tends to hold personal information you would not want on screen if someone borrows your unlocked phone. Photo managers usually ask for full library access. That gives them every picture, along with its location and date metadata.
Social apps are built around identity and contacts, so data linked to you is nearly universal. Tracking and contact upload are the settings worth checking.
A lock answers one question — who can open the app on this iPhone. It does not change what Photo 3D sends to its developer; for that, see Photo 3D's full privacy report.
What the lock does and does not do
It does
- Ask for Face ID, Touch ID or passcode every time Photo 3D opens
- Hide message previews in notifications
- Keep Photo 3D's content out of Spotlight and Siri suggestions
- With Hide, remove the icon from the Home Screen
It does not
- Stop someone who knows your passcode
- Encrypt or change how Photo 3D stores data
- Sync to your iPad or other devices
- Remove Photo 3D from purchase history or Screen Time reports
Don't see Require Face ID?
- Update to iOS 18 or later in Settings › General › Software Update.
- Make sure a passcode is set in Settings › Face ID & Passcode; the lock needs one.
- Some Apple apps (Settings, Calculator, Camera, Maps, Find My, Clock) cannot be locked or hidden.
- If your iPhone is managed by work or school, the option may be restricted.
Other settings worth checking for Photo 3D
Photos
Settings › Privacy & Security › Photos. Limited Access lets you pick exactly which pictures the app can see; Add Photos Only lets it save without reading your library.
Contacts
Settings › Privacy & Security › Contacts. Limited Access shares only the people you select instead of your whole address book.
Notifications
Settings › Notifications › Photo 3D › Show Previews: When Unlocked keeps message and account details off the Lock Screen.
Photo 3D's full privacy label
The developer has not provided privacy details on the App Store.
Lock these apps too
After you lock Photo 3D
Done. You have applied every control the label points to.
FAQ
Does Photo 3D have its own passcode?
What happens to Photo 3D's notifications when it is locked?
Can someone who knows my passcode open a locked app?
Is a locked Photo 3D encrypted?
Why can't I see the Require Face ID option?
Does hiding Photo 3D remove it from my purchase history?
Is Photo 3D safe? Full privacy report →Lock an app: A–Z →All social networking apps →