If you want to protect access to your Reolink App, you may refer to the following steps to set an App password for the Reolink App.

Applies to: All Reolink devices.

Step 1. Launch Reolink App and tap the three_short_lines.pngicon to get the side menu. 
App list
Step 2. Tap Settings and toggle to enable App Password. 

app settingsapp password

Step 3. Create a password with at least 4 digit characters, and then tap Save on the top right corner to save the setting.

create a password and tap save

Note: Instead of using the passcode, you may also enable Unlock with Face ID or Unlock with Touch ID on your iPhone.

face IDallow face id second

Done! You have successfully enabled password protection for Reolink App. The next time when you open the App, you will be required to enter the login password.

enter app password

Note: If you forgot the password on your iPhone, you have to uninstall the App and then reinstall it in the App Store. For Android App, you will need to clear the cache after reinstalling the App. Besides, Reolink App will lose all the cameras which have been added to it after you finish this operation.