Folder Locker app provides password protection of photos, videos, secured wallets, data recovery, decoy mode, stealth mode, hack attempt monitoring, and more. It protects your personal files, documents, contacts, and audio recording in android phones. The app locks your system apps like gallery messages, contacts, Facebook, Whatsapp, and more.
There is no password protection or locking system in Google Keep, but you can download the Folder locker app from moboapp.info and use it to secure your Google keep.