If you share your iPhone 16 with family, coworkers, or a curious friend, app privacy can get tricky fast. Maybe you want to keep your Messages, Photos, banking app, or work tools away from prying eyes, or maybe you just want a little more control when someone borrows your phone. The good news is that locking apps on iPhone 16 is quick, built-in, and easier than most people expect.
In this guide, you will learn the fastest way to lock apps on iPhone 16 using Apple’s built-in app locking features, plus a few useful alternatives for edge cases. You will also see what to do if an app does not show the lock option, how to handle Face ID or passcode issues, and a few privacy tips that make your phone much harder to snoop through. If you just want the short version, jump to the summary below. If you want the full step-by-step, keep reading.
Summary
- Press and hold the app on your Home Screen.
- Tap Require Face ID or Require Passcode.
- Confirm with Face ID, Touch ID, or your iPhone passcode.
- The app is now locked and will ask for authentication before opening.
Tutorial – How to Lock Apps on iPhone 16 Using Face ID or Passcode
This is the main method for locking apps on iPhone 16. It works best for built-in Apple apps and many third-party apps that support app locking through iOS. Once enabled, the app stays on your phone, but it cannot be opened without Face ID or your passcode.
Step 1: Find the app you want to lock
Press and hold the app icon on your Home Screen or in the App Library until the quick actions menu appears.
After you do this, you should see a small pop-up menu with options like Remove App, Edit Home Screen, and, on supported apps, Require Face ID or Require Passcode.
Step 2: Tap the lock option
Tap Require Face ID or Require Passcode from the menu.
If you see Require Face ID, that is the most secure and convenient option on iPhone 16. Some apps may show Require Passcode instead, depending on the app and your iPhone settings.
Step 3: Confirm your identity
Use Face ID when prompted, or enter your iPhone passcode if asked.
Once you confirm, iPhone will apply the lock immediately. You should see a confirmation message, and the app icon may briefly update to show it is protected.
Step 4: Open the app to test the lock
Tap the app icon again to make sure it asks for authentication before opening.
You should now see a Face ID prompt or passcode screen before the app launches. If the app opens right away, the lock was not applied. Repeat the steps and make sure you confirmed the change.
Step 5: Remove the lock later if needed
If you want to unlock the app again, press and hold the app icon, then tap Don’t Require Face ID or Don’t Require Passcode.
After you confirm, the app will open normally without an authentication prompt. This is useful if you are the only one using the phone and no longer need the extra privacy layer.
Alternative Methods and Edge Cases
Not every app behaves the same way, and not every iPhone setup looks identical. Here are the most common variations you may run into.
Use Screen Time to restrict app access
If an app does not offer a built-in lock option, use Screen Time to limit access with a passcode.
- Go to Settings.
- Tap Screen Time.
- Select App Limits or Content & Privacy Restrictions.
- Set a Screen Time passcode if you have not already.
This is not as direct as a true app lock, but it is a solid backup for restricting access to certain apps or app categories.
Hide an app instead of locking it
If your goal is privacy, you may prefer to hide the app from view.
- Press and hold the app icon.
- Tap Require Face ID if available, or use the option to move the app away from the Home Screen.
- You can also remove it from the Home Screen while keeping it in the App Library.
This does not delete the app. It just makes it less visible, which is helpful if you want a cleaner Home Screen or a little extra privacy.
Lock built-in Apple apps and supported third-party apps
Some apps, especially Apple’s built-in apps, are more likely to support direct locking.
Common examples may include:
- Photos
- Notes
- Messages
- Banking or password manager apps that support iOS security features
If you do not see a lock option, the app may not support native locking yet. In that case, use Screen Time or the app’s own in-app privacy settings.
Use the app’s own security features
Many banking, password, and messaging apps have their own lock settings.
Look inside the app for options like:
- Require Face ID
- Biometric Login
- App Lock
- Privacy Lock
This can be more reliable than a system-level option, especially if the app handles sensitive data.
Frequently Asked Questions
Will locking an app delete my data?
No. Locking an app only adds authentication before opening it. Your data stays on the iPhone.
Can I lock every app on iPhone 16?
Not always. Some apps support native locking, but others do not. If an app does not show a lock option, try Screen Time or the app’s own privacy settings.
Does app locking work with Face ID only?
No. If Face ID is unavailable, you can usually use your iPhone passcode instead.
Can someone still see notifications from a locked app?
Yes, in some cases. Locking an app does not always hide notification previews. To reduce exposure, adjust notification settings in Settings > Notifications.
How do I unlock an app after I have locked it?
Press and hold the app icon, then tap Don’t Require Face ID or Don’t Require Passcode, and confirm when prompted.
What if I do not see the lock option?
The app may not support app locking yet, or your iPhone may need an iOS update. Try updating iOS, restarting the phone, or using Screen Time as a fallback.
Tips
- Keep Face ID enabled for the fastest and most secure app access.
- Use a strong iPhone passcode because it serves as your backup if Face ID fails.
- Turn off notification previews for sensitive apps to increase privacy.
- If you often hand your phone to others, combine app locks with Guided Access for extra control.
- Check app-specific privacy settings, because many apps offer their own lock or login options.
- Update iPhone regularly, since Apple often adds or improves privacy features in new iOS versions.
Troubleshooting
- If the lock option is missing, make sure your iPhone 16 is updated to the latest version of iOS.
- If Face ID is not working, clean the front camera area, then try again or use your passcode.
- If the app still opens without asking for a lock, remove the lock and reapply it from the app icon menu.
- If you forgot your Screen Time passcode, you may need to reset it through your Apple ID settings.
- If app notifications are still visible, go to Settings > Notifications and reduce lock screen previews.
- If an app seems unstable after locking it, restart your iPhone and check whether the app has its own update available in the App Store.
Conclusion
Locking apps on iPhone 16 is one of the simplest ways to protect your privacy without deleting anything or changing how you use your phone. For most users, the process takes just a few taps, and once it is set up, the protection is automatic.
If your app supports native locking, use it first. If not, Screen Time and app-specific security settings give you strong backup options. With the right setup, your iPhone stays easy for you to use and much harder for anyone else to access.
Matthew Burleigh has been writing tech tutorials since 2008. His writing has appeared on dozens of different websites and been read over 50 million times.
After receiving his Bachelor’s and Master’s degrees in Computer Science he spent several years working in IT management for small businesses. However, he now works full time writing content online and creating websites.
His main writing topics include iPhones, Microsoft Office, Google Apps, Android, and Photoshop, but he has also written about many other tech topics as well.