Google Calendar is a popular calendar app for Android. It’s free and easy to use, and it has a lot of features that make it a great choice for busy people. If you’re using Google Calendar on your Android phone, there are a few things you can do to make sure your data is safe and secure. First, make sure you have the latest version of the app installed. Second, make sure you’re using a secure connection when backing up your data. Finally, be sure to password protect your calendar account if you want to keep it private.