The Private Diary App is built for the people who are keen about the privacy. The Private Diary App won't store any data in servers. Instead, it uses your device's local storage as its primary storage. But what happens your entries if the app gets deleted or device gets stolen? Well, the App has a Sync feature which helps you to store your diary entries in your Google Drive account. This App is Open Source.
The Private Diary App has an easy and clean User Interface. Create and edit entries seamlessly. Your entries will be secured with a strong password protection (optional). The App can sync all your entries with your Google Drive, only if you chose to do so.