How to Passcode-Lock Any App on Your Phone
You are, we hope, already protecting your phone with a PIN, a fingerprint, or a face (or all three), but sometimes you'll want to add an extra barrier to particular apps—if you're lending your phone to a friend, say, or if your kids or partner are always borrowing your phone for whatever reason.
How you want to apply this additional protection is up to you. Some apps come with it built in; in other cases you'll need to enlist the help of a third-party app. The process is also different depending on whether you're using Android or iOS, and so we've split our guide up into two sections.
Apple doesn't give third-party apps quite as much leeway on iOS as Google does on Android, so you won't find any general-purpose locking tools in the App Store. Instead, you're relying on the individual apps themselves—many apps that can hold sensitive information will give you additional options.
