Note: This app is not sponsored or endorsed by, or affiliated with, Snap Inc. SC Chat Locker is a must-have app for those who want to secure their SC messenger or chats. Using this app, you can protect your personal data from unauthorized access. This app not only protects and secures chats but also allows them to lock SC. This means no one without the passcode will be able to read the chat or access the SC app. Setting a passcode/fingerprint for your phone goes a long way, but all this becomes