Virtual SoftKeys (no root) is a free Android app developed by Daxia. It is designed for tablets with hardware buttons and provides a system navigation bar. The app does not require any extra permission and even supports stylus, including Samsung S-pen and ASUS Z stylus.

The app uses the "accessibility service" to call the system home, back, and recent buttons. However, the developer assures that it does not use it to gather any extra information. The app is open-source and available on GitHub.

Overall, Virtual SoftKeys (no root) is a useful app for tablet users who prefer a navigation bar over hardware buttons. It is easy to use and does not require any special permissions, making it a safe option for those who are concerned about their privacy.