How to Lock Apps and Photos with Face ID: Complete 2026 Guide

Your iPhone holds a surprising amount of personal information — private messages, banking apps, medical records, and photos you'd rather not have a friend stumble across while scrolling through your camera roll. The good news is that Apple has built powerful biometric protection directly into iOS, and you can now lock apps and photos with Face ID in just a few taps.

This complete guide walks you through every native method available in iOS 18 and later, covers third-party options, and shares privacy best practices to keep your data protected even if someone else picks up your phone.

Why You Should Lock Apps and Photos with Face ID

Face ID adds a second layer of biometric authentication on top of your device passcode. Even if someone knows how to unlock your iPhone — a partner, child, or coworker — they still can't open apps or view photos you've explicitly locked without your face.

Common scenarios where per-app locking matters:

Handing your phone to a child to play a game
Showing a friend a photo without letting them swipe through your library
Protecting banking, health, or dating apps from casual snooping
Keeping journals, notes, or work documents private
Reducing risk if your phone is stolen while unlocked

How to Lock Any App with Face ID (iOS 18 and Later)

Starting with iOS 18, Apple added a system-wide feature that lets you lock any app on your iPhone with Face ID, Touch ID, or your passcode. This is the biggest privacy upgrade iOS has received in years.

Step-by-Step: Lock an App with Face ID

Go to your Home Screen or App Library.
Touch and hold the app icon you want to lock until the context menu appears.
Tap Require Face ID (or Require Touch ID on older models).
Confirm by tapping Require Face ID again in the popup.
Authenticate with Face ID to finalize the setting.

Now, every time you or anyone else opens that app, iOS will prompt for Face ID. Notifications and content from the app are also hidden from search, Siri suggestions, and the notification center.

How to Unlock or Remove the Lock

Touch and hold the locked app icon.
Tap Don't Require Face ID.
Authenticate with Face ID to confirm.

How to Hide Apps Completely with Face ID

Locking an app keeps its content protected, but the icon is still visible on your Home Screen. If you want to go a step further and make the app itself invisible, iOS 18 introduced a Hidden apps folder.

Steps to Hide an App

Touch and hold the app icon.
Tap Require Face ID.
Tap Hide and Require Face ID.
Confirm the action.

The app disappears from your Home Screen, Spotlight search, Siri, and notifications. To access it again, scroll to the bottom of your App Library and open the Hidden folder — which itself requires Face ID authentication.

How to Lock Photos with Face ID

The Photos app has its own privacy features that let you hide sensitive images behind Face ID without needing to lock the entire Photos app.

Using the Hidden Album

Every iPhone has a built-in Hidden album that is protected by Face ID by default in iOS 16 and later.

Open the Photos app.
Select the photo or video you want to hide.
Tap the three-dot menu (⋯) in the top-right corner.
Tap Hide.
Confirm Hide Photo.

The photo is moved to the Hidden album, which appears under Utilities in the Albums tab. Face ID is required every time you open it.

Enable Face ID for the Hidden and Recently Deleted Albums

Open Settings.
Scroll down and tap Apps → Photos.
Toggle Use Face ID on.

This ensures both the Hidden and Recently Deleted albums require biometric authentication.

Locking the Entire Photos App

If you'd rather keep the entire library behind Face ID, use the same long-press method from the Home Screen:

Long-press the Photos app icon.
Tap Require Face ID.
Confirm.

Comparison: Native iOS Locking Options

Feature	Lock App	Hide App	Hidden Album
Requires Face ID	Yes	Yes	Yes
Visible on Home Screen	Yes	No	N/A
Appears in Search	No	No	No
Notifications hidden	Yes	Yes	N/A
Best for	Everyday privacy	Sensitive apps	Private photos/videos
iOS Version	iOS 18+	iOS 18+	iOS 16+

Locking Specific Apps: Notes, Messages, and More

Some Apple apps have their own built-in locking features that predate the system-wide iOS 18 option. These offer more granular control.

Lock Individual Notes with Face ID

Open the Notes app.
Open the note you want to lock.
Tap the share button or three-dot menu.
Tap Lock.
Choose Use Device Passcode or set a custom password — Face ID unlocking is enabled by default.

Lock Voice Memos

iOS lets you lock individual voice recordings by long-pressing them in the Voice Memos app and choosing Lock or by locking the entire app from the Home Screen.

Third-Party Apps That Add Face ID Protection

Many apps offer their own in-app Face ID lock as an extra layer beyond the iOS system lock. Popular examples include:

WhatsApp: Settings → Privacy → Screen Lock → Require Face ID
Signal: Settings → Privacy → Screen Lock
1Password: Face ID unlock is built into the vault
Dropbox: Settings → Face ID/Touch ID
PayPal, Venmo, and most banking apps: enable in each app's security settings

Enabling app-level Face ID and iOS-level locking gives you defense in depth — if one layer is bypassed, the other still protects your data.

Best Practices for Face ID Privacy

Face ID is only as strong as the settings surrounding it. Follow these best practices to maximize your protection.

1. Use a Strong Alphanumeric Passcode

If Face ID fails three times, iOS falls back to your passcode. A six-digit number can be brute-forced in hours; a custom alphanumeric passcode of 10+ characters is significantly harder to crack.

Go to Settings → Face ID & Passcode.
Enter your current passcode.
Tap Change Passcode → Passcode Options → Custom Alphanumeric Code.

2. Enable "Require Attention for Face ID"

This prevents Face ID from unlocking when your eyes are closed — useful if you're asleep or unconscious.

Settings → Face ID & Passcode → toggle on Require Attention for Face ID.

3. Turn Off Lock Screen Widgets and Notifications

Locked apps still can't protect information that leaks through lock screen previews. Head to Settings → Notifications and set previews to When Unlocked or Never for sensitive apps.

4. Enable Stolen Device Protection

Introduced in iOS 17.3, this feature adds a one-hour security delay before critical settings can be changed when your iPhone is away from familiar locations. Enable it under Settings → Face ID & Passcode → Stolen Device Protection.

5. Be Careful with Shared Links

When sharing content from locked apps — screenshots, documents, or links — use a privacy-respecting link shortener that doesn't log personal data or track recipients. Services like Lunyb let you create clean, short links without invasive tracking. If you want to compare options, see our 2026 buyer's guide to URL shorteners.

Troubleshooting: Face ID Not Working on Locked Apps

If Face ID stops recognizing you for locked apps, try these fixes in order:

Clean the TrueDepth camera at the top of your iPhone with a soft, dry cloth.
Restart your iPhone — hold the side button and either volume button, then slide to power off.
Reset Face ID: Settings → Face ID & Passcode → Reset Face ID, then set it up again.
Add an alternate appearance if you wear glasses, makeup, or a beard sometimes.
Update iOS to the latest version in Settings → General → Software Update.

What Face ID Locking Cannot Protect Against

Face ID is excellent for casual privacy, but it is not a silver bullet. Be aware of its limits:

iCloud backups: Photos synced to iCloud can be viewed on any signed-in device or via iCloud.com — even if the local Photos app is locked.
Shared albums: Anyone with access can see the contents regardless of your local locks.
Determined attackers: Law enforcement and forensic tools can sometimes bypass biometrics with a passcode.
Compelled unlock: In some jurisdictions, you can be legally required to unlock your phone with your face but not with a passcode. Press the side button + volume up quickly to disable Face ID temporarily.

Do Android Phones Have a Similar Feature?

Yes — most modern Android phones offer app locking through built-in features or manufacturer add-ons. Samsung has Secure Folder, Xiaomi has App Lock, and Google Pixel offers per-app biometric protection in some regions. The overall concept is the same: authenticate with your face or fingerprint before opening the app.

FAQ

Can I lock the Settings app with Face ID?

No. Apple does not allow the Settings app itself to be locked with Face ID, since that would create a lockout loop if authentication ever failed. Sensitive sections inside Settings — like Face ID & Passcode — already require your device passcode.

Does locking an app hide its notifications?

Yes. When you enable Require Face ID for an app in iOS 18, notifications, badges, and content previews from that app are hidden from the lock screen, Notification Center, and search until you authenticate.

Will locking apps drain my battery?

No. Face ID is highly optimized and the additional authentication uses a negligible amount of power. You won't notice any battery difference from locking multiple apps.

Can someone unlock my phone with a photo of my face?

No. Face ID uses a 3D depth map generated by the TrueDepth camera, so flat photos, videos, or standard masks won't unlock it. Apple states the false-match rate is roughly 1 in 1,000,000.

What happens to locked apps when I get a new iPhone?

When you restore from an iCloud or encrypted backup, your locked app settings transfer automatically. You may need to re-authenticate with Face ID the first time you open each locked app on the new device.

Final Thoughts

Locking apps and photos with Face ID takes less than a minute per app and instantly raises the privacy bar on your iPhone. Combine per-app locks with a strong passcode, careful notification settings, and Stolen Device Protection, and you'll have a device that safeguards your personal life even when it leaves your hands.

Privacy is built one small habit at a time. Start with your most sensitive three apps today — banking, messaging, and photos — and expand from there. For more privacy-focused guides and honest tool reviews, browse the rest of the Lunyb blog.