You may have saved some very sensitive info in WhatsApp chats that you like to lock with a password so other people who use your phone can’t access them. Unfortunately WhatsApp does not have such a password or pattern lock system built in. If you want to protect your privacy in WhatsApp or other instant messengers, like Facebook Messenger, Skype, WeChat, Line, Viber, you can use a third party security app or app locker. LOCKit and ES App Locker are two of them. In this quick guide, we’ll show you how to put a password lock on WhatsApp so as to add another level of security to your private information on the mobile in addition to the phone screen lock. We’ll use a Samsung Galaxy smart phone and our favorite app locker, LOCKit, in this demo. This is a free app locker available on Google Play and many other Android app stores and markets. You can also download it from the bottom of this article.
How to hide, protect and lock WhatsApp messenger & chats on Android?
Run Lockit app on your Samsung or other Android powered phone, such as LG, HTC, Nexus, Motorola, Lenovo, ZTE, Huawei, etc. You’ll see the app list opens automatically in the mobile security app. Find WhatsApp in the list and touch the lock icon besides it to lock WhatsApp. After that tap the Lock button at the screen bottom and continue to add a password and/or pattern to protect the Lockit app itself and any apps you would like to secure with a lock pattern/password. You can find more detailed instructions from this tutorial to lock apps and photos on Android phone and this guide to lock certain apps on Samsung devices.
From now on anyone trying to open WhatsApp messenger on your phone will be blocked by the preset pattern lock or PIN code. Unauthorized person can’t see your WhatsApp conversations and chat history even if the phone’s screen is unlocked. Now you do not need to worry about Android screen being unlocked using a screen lock remover neither. If you want, you can also password protect any other messengers, app and even phone settings following above steps. To completely hide WhatsApp chats, you may also need to lock notifications and new messages alerts on the phone, so when you receive a new messages in WhatsApp, the message content will not be displayed in the notification panel on your phone.