Screen Lock App Iphone. Open the settings on your ipad or iphone. Go to settings on your iphone or ipad:
You can lock apple notes individually on an iphone. To turn on the screen lock: Tap on the app you want to lock, and tap add limit.
On the next screen, tap on use screen time passcode.
When the app opens, scroll down and tap on the option that says wallpaper. From the lock screen, you can see notifications, open camera and control center, get information from your favorite apps at a glance, and more. Turn screen lock on or off, go to 1a. Whatsapp has protections in place as well to keep prying eyes out of your messages.