Apple Pages

Your writing is just that — yours — so the work you do in Apple Pages should remain private until you choose to share it. Apple seems to share this sentiment. As another symbol of its dedication to user privacy and security, the company includes a feature in its word-processing app for iOS that allows you to lock documents behind a password, as well as with Face ID or Touch ID.

Google Docs is made for teamwork and collaboration, but Apple's iWork suite also comes with the same functionality. If you're working on a Pages document on your iPhone, and you want input from other members of your team, you can easily invite them to view, comment, edit, and more right alongside you.