Open Snapchat
Tap your profile icon
Tap the gear icon for Settings
Tap “Two-Factor Authentication” and turn it on
Set up a verification method
Use your phone’s built-in app lock or screen lock to protect Snapchat
On iPhone, use Screen Time to lock Snapchat with a passcode
On Android, use App Lock or Secure Folder to lock Snapchat with a password or PIN
Keep your device passcode strong and private