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

Your iPhone holds an incredible amount of personal information—private conversations, sensitive photos, banking details, and confidential notes. While your device lock screen offers a first layer of protection, anyone who borrows your unlocked phone can easily peek into your apps and photo library. Fortunately, Apple has built powerful biometric tools into iOS that let you lock individual apps and specific photos behind Face ID, adding a critical second layer of privacy.

In this comprehensive guide, you'll learn exactly how to lock apps and photos with Face ID using both built-in iOS features and trusted third-party solutions. Whether you're worried about a curious friend, a nosy coworker, or simply want peace of mind, this walkthrough covers everything you need.

What Does It Mean to Lock Apps and Photos with Face ID?

Locking apps and photos with Face ID means requiring facial biometric authentication each time someone tries to open a specific app or view a hidden photo album on your iPhone. Even if your device is already unlocked, the protected content stays sealed until Face ID confirms your identity.

This feature became significantly more powerful with iOS 18, which introduced native app locking for virtually any app on your device. Before this update, users relied on Screen Time restrictions or third-party workarounds. Today, the process takes just seconds and works seamlessly across the entire iOS ecosystem.

Why You Should Lock Individual Apps

• Prevent accidental exposure: Kids, partners, or friends borrowing your phone can't stumble into private apps.
• Protect financial data: Banking, investment, and payment apps get an extra security layer.
• Secure sensitive conversations: Messaging apps stay locked even if your phone is unlocked.
• Guard health information: Medical apps, fitness trackers, and journals remain private.
• Protect work data: Email, Slack, and productivity apps stay confidential.

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

iOS 18 introduced a game-changing feature that allows you to require Face ID for almost any app installed on your iPhone. Here's the step-by-step process:

1. Locate the app you want to lock on your Home Screen or App Library.
2. Long-press the app icon until the context menu appears.
3. Tap "Require Face ID" from the menu options.
4. Confirm your choice by tapping "Require Face ID" again in the confirmation popup.
5. Test the lock by tapping the app icon—Face ID should activate immediately.

Once locked, the app's notifications will be hidden, its content won't appear in search results, and Face ID will be required every time it's opened. If Face ID fails or is unavailable, users can enter your device passcode as a fallback.

How to Remove Face ID from an App

If you decide you no longer need an app locked, removing protection is just as simple:

1. Long-press the locked app icon on your Home Screen.
2. Select "Don't Require Face ID" from the menu.
3. Authenticate with Face ID to confirm the change.

How to Hide Apps Completely with Face ID

Beyond locking apps, iOS 18 lets you hide apps entirely. Hidden apps are moved to a locked "Hidden" folder inside your App Library, and they don't appear in search, Siri suggestions, or notifications.

1. Long-press the app you want to hide.
2. Tap "Require Face ID."
3. Choose "Hide and Require Face ID" instead of just requiring authentication.
4. Confirm the action with Face ID.

To access hidden apps, open App Library, scroll to the bottom, and tap the "Hidden" folder. Face ID will unlock the folder, revealing your hidden apps.

How to Lock the Photos App with Face ID

The Photos app can be locked using the same Face ID method as any other app. However, iOS also includes specialized features for protecting individual photos and videos within your library.

Locking the Entire Photos App

1. Long-press the Photos app icon.
2. Tap "Require Face ID."
3. Confirm your selection.

Locking the Hidden Album

iOS includes a built-in "Hidden" album that's automatically protected by Face ID. To move photos into it:

1. Open the Photos app and select the photo or video you want to hide.
2. Tap the three-dot menu (⋯) in the top-right corner.
3. Select "Hide" from the dropdown.
4. Confirm by tapping "Hide Photo."

To view hidden photos, go to Photos > Utilities > Hidden. Face ID will authenticate before displaying the album.

Ensuring the Hidden Album Is Locked

Confirm that Face ID protection is enabled for the Hidden album:

1. Open Settings.
2. Scroll down and tap Photos.
3. Ensure "Use Face ID" is toggled on for the Hidden album.
4. Also enable "Use Face ID" for the Recently Deleted album.

Locking Specific Apps: Popular Examples

Below is a quick comparison of methods for locking commonly used apps:

Locking WhatsApp with Face ID

1. Open WhatsApp and tap Settings.
2. Go to Privacy > Screen Lock.
3. Toggle on "Require Face ID."
4. Choose how quickly the lock activates (immediately, after 1 minute, etc.).

Locking Individual Notes

1. Open the Notes app.
2. Swipe left on the note you want to lock.
3. Tap the lock icon.
4. Choose "Use Device Passcode" or set a custom password with Face ID.

Using Screen Time to Lock Apps (Older iOS Versions)

If your iPhone runs iOS 17 or earlier and doesn't support the native "Require Face ID" option, you can use Screen Time as a workaround.

1. Open Settings > Screen Time.
2. Tap "App Limits" > "Add Limit."
3. Select the apps you want to restrict.
4. Set the time limit to 1 minute.
5. Enable "Block at End of Limit."
6. Set a Screen Time passcode that only you know.

After one minute of use, the app will lock and require your Screen Time passcode to reopen. While this isn't true Face ID protection, it does add a barrier against casual snooping.

Best Practices for Mobile Privacy Beyond App Locking

Locking apps is just one piece of a larger privacy strategy. Consider these additional steps to strengthen your overall mobile security:

• Enable Stolen Device Protection in Settings > Face ID & Passcode to prevent thieves from changing your Apple ID password even with your passcode.
• Turn on Advanced Data Protection for end-to-end encrypted iCloud backups.
• Use encrypted DNS like Cloudflare's or NextDNS to prevent third parties from monitoring your browsing.
• Review app permissions regularly under Settings > Privacy & Security.
• Enable Lockdown Mode if you're a high-risk user (activists, journalists, executives).
• Use short, private links when sharing sensitive content. Services like Lunyb let you create secure, privacy-focused short URLs without exposing tracking parameters.

Protecting Links You Share

When you share screenshots or files from locked apps, the URLs you send can leak metadata. Using a privacy-focused shortener helps mask original destinations and reduces the tracking footprint. Learn more in our honest Lunyb review and compare options in our 2026 URL shortener buyer's guide.

Troubleshooting Common Face ID Locking Issues

Face ID Isn't Working After Locking an App

If Face ID fails when opening a locked app, try these fixes:

1. Ensure your face is clearly visible and not obstructed.
2. Go to Settings > Face ID & Passcode and verify Face ID is enabled for iPhone Unlock and iTunes & App Store.
3. Reset Face ID by tapping "Reset Face ID" and setting it up again.
4. Restart your iPhone to clear any temporary glitches.

"Require Face ID" Option Doesn't Appear

The option requires iOS 18 or later. Check for updates in Settings > General > Software Update. Some system apps (like Phone) may not support the feature.

Locked Apps Still Show Notifications

When you enable Face ID for an app, notifications should be automatically hidden. If they still appear, go to Settings > Notifications, tap the app, and manually adjust notification previews to "When Unlocked" or "Never."

Pros and Cons of Locking Apps with Face ID

Pros

• Fast, seamless authentication using biometrics
• No need to remember additional passwords
• Hides notifications and search results for extra privacy
• Native support in iOS 18+ works with almost any app
• Passcode fallback ensures you're never locked out

Cons

• Requires iOS 18 or later for full functionality
• Face ID can occasionally fail in poor lighting or with masks
• Anyone with your device passcode can still bypass the lock
• Not all system apps support the feature
• Locked apps can still be uninstalled without authentication

Frequently Asked Questions

Can I lock any app with Face ID on iPhone?

On iOS 18 and later, you can require Face ID for virtually any app on your iPhone, including third-party apps like Instagram, TikTok, and banking apps. A few system apps may not support this feature. Simply long-press the app icon and select "Require Face ID."

Does locking an app with Face ID also hide notifications?

Yes. When you enable Face ID for an app, iOS automatically hides notification content, and the app won't appear in search results or Siri suggestions. This provides comprehensive privacy protection beyond just the app icon itself.

Can someone bypass Face ID with my passcode?

Yes, your device passcode serves as a fallback when Face ID fails. If you share your passcode with someone, they can access locked apps. To prevent this, keep your passcode private and enable Stolen Device Protection in Settings, which adds additional security requirements outside of trusted locations.

Will locking the Photos app hide all my photos?

Locking the Photos app requires Face ID to open the entire app. To hide specific photos, use the built-in Hidden album by tapping the three-dot menu on any photo and selecting "Hide." The Hidden album is separately protected by Face ID.

What happens if Face ID stops working on a locked app?

If Face ID fails, you can enter your device passcode as a fallback to access the app. If Face ID hardware is damaged, you can still unlock apps using your passcode. To fully restore functionality, visit an Apple Store or authorized service provider.

Does locking apps drain more battery?

No noticeable battery impact. Face ID authentication is highly optimized and uses minimal power. The convenience and privacy benefits far outweigh any minor energy consumption from the additional authentication checks.

Final Thoughts

Locking apps and photos with Face ID is one of the simplest yet most powerful privacy upgrades you can make to your iPhone. With iOS 18's native support, protecting sensitive apps takes just a few taps—no complicated workarounds or third-party tools required. Combined with the Hidden album for photos and thoughtful notification management, you can create a personalized privacy shield that keeps prying eyes out of your most sensitive data.

Remember that biometric locking is just one layer of a strong security strategy. Pair it with regular software updates, cautious link sharing, encrypted DNS, and mindful app permissions to build a truly private mobile experience. Your data is worth protecting—and now you have the tools to do it.