There are several ways to lock files on iphone. One way is to use a third-party app that allows you to lock apps, folders, and even your home screen. Another method is to use a password-protected cloud storage service. Finally, you can also use an app to hide specific apps on your phone. While these methods can help to protect your private data, they are not foolproof and will still allow someone with access to your device to launch certain apps.
The iOS 16 and iPadOS 16 updates included a feature that allows you to password-protect PDF files stored locally on your iPhone. To do this, open the Files app and select the PDF you want to protect. Tap the More button and then Hide. To view the hidden PDF, you’ll need to enter your passcode or Touch or Face ID. To move the PDF back to your regular photo library, head to the Hidden album and then tap the three-dot menu button and then Unhide.
If you have sensitive information on your iPhone like credit card numbers, bank statements or family photos, you can protect them with a secure folder. This will require a password to open and is an effective way to keep your information safe from prying eyes. The easiest way to create a secure folder on your iPhone is with an app called Owlfiles. This is a free app that looks like a simple calculator, but in reality it’s a secret vault for your personal files.