If you want to lock some of your whatsup chat instead of locking full application, then here is an application that locks perticular chat only that you want.
* How to use Whats Lock :
Step 1 : On the first time installation, set security question/answer in case if you forget and want to recover password then use security question/answer to recover password.
Step 2 : After that set your 4-digit number password.
Step 3 : Then add your personal chats to this chat locker and lock them.
step 4 : Change the default theme, change password, recover password and enable/disable password from settings.
* Main Features :
- Protect your password with your security question.
- Lock/Unlock personal chat as well as group chats.
- Set your 4-digit password to lock your personal chats.
- Set your favorite theme from setting options.
- Change password with the help of security question/answer.
- Enable/Disable password options
- Also use your fingerprint to unlock password
- Available