Allowing a person to use your phone should not mean snooping on your text messages, photos or emails, so there are certain steps that enable you to lock sensitive applications, so that only one can access them with your permission.

Everyone really protects their phone with a PIN, fingerprint or face (or three), but sometimes you may want to add an additional barrier to certain apps, if you lend your phone to a friend, or if your children or wife are always using your phone for any reason one of the reasons.

How do you want to apply this additional protection? Some apps come bundled with it; In other cases, you will need to seek help from a third-party app.

The process also varies depending on the operating system you use, whether Android or iOS. So we divided the guide into two parts.

Lock apps on iOS

Apple doesn't give external applications as much flexibility on its system as Google does with Android, so you won't find any general purpose lock tools in the Apple store.

Alternatively, the features of the applications themselves can be relied upon, and many applications that can keep sensitive information will give you additional options to protect your information.

One example is the Apple Note application on iPhones, where you can lock individual notes by clicking on the Share button (inside a note) or long pressing a note (in the list of notes) and then choosing to lock the note.

Notes are locked using any of the methods used in the phone, whether fingerprint, face recognition or secret code, and you can set the method through the "Note" settings on any OS.

WhatsApp also contains protection to keep prying eyes out of your messages. From the main screen, you need to click Settings, then Account, Privacy, and Screen Lock, and you will then be able to set a fingerprint or face ID to guard access to your conversations.

If either of these methods fails, you will be returned to your phone's lock screen passcode.

Another third-party app with the same safety meter on Apple is the Drawbox, which is useful if you do not want your child to unintentionally wipe all of your files with a tap of a finger.

Click the account, then the gear icon (top left), then turn on the passcode. When setting a passcode, you will also be given the option to use the fingerprint or face ID as well.

We can't guide you through every app on iOS, but take a look inside your favorite apps to see if an additional layer of security is included.

Evernote, Amazon, and Paypal 3 other apps can be locked with fingerprint or faceprint, and many banking apps now have the same feature as well, so even if someone can access your phone - with or without your permission - he cannot access To all of your applications.

You have some other tools that you can use on iOS that were not primarily intended for securing apps, but they can do the same job.

The first is Screen Time, which you can access from the settings: If you click, use the "Screen Time" entry to set a passcode, then select "App Limits", and set the daily limit for the application's use of the hour. The app is locked when others try to use it without the passcode.

The second option is targeted access, which you will find in the Accessibility menu in Settings.

Once activated, open an app and press 3 times the side button or the home button, then you will not be able to switch to any other application without entering the phone passcode.

It's perfect if you want to let a child play a game on your phone, but you don't want them to mess with any other apps.

Lock apps on Android

Android allows third-party apps to control access to other apps, so you can install one of these apps and block access to any apps that you don't want others to spy on.

Usually a passcode is required for access, although some lock tools can work with fingerprint sensors or facial recognition.

There is a full set of these applications available on Android. However, keep in mind that these apps need special access to your phone and apps; Because this is what you need to work, therefore it is important to consider downloading the applications you absolutely trust.

With that in mind, the Norton App Lock is the recommended tool, from a name you can trust (You do not need to subscribe to any other Norton products to use the AppLock), in which case you can Lock apps either with a passcode or pattern drawn on the screen, and there is also an option to block access to the modern apps screen as well.

Once Norton App Lock is installed and easy to use, just click on the apps you want to protect with the passcode or pattern.

There is also the option to either turn the Norton App Lock on or off as needed, and if you forget your passcode or pattern, it can be recovered using the Google Account linked to the Norton App Lock.

Some individual applications have also taken it upon themselves to put additional safeguards in place.

One such device, as with any OS, is Dropbox. If you go to settings from the main application menu, you can select configure passcode to do exactly that.

Anytime you or anyone else opens Dropbox on Android, a passcode will be required.

Finally, you can use the Android feature called Screen Pinning to keep kids, friends or colleagues inside a specific app.

Bring up the recent apps screen (which is to scroll up and hold the latest versions of Android), then click the icon above the application you want to have available, then click Install. Switching to any other app will not be possible until the phone passcode is entered.