Date and Time of Phone and GPS is a free Android app developed by oxdb.net in the Utilities & Tools category. This application is a simple clock that displays the system time and GPS time simultaneously. It also shows the date, hour, minute, and second, along with the millisecond difference between the system and GPS time. However, keep in mind that this app is not compatible with some devices.

The app is straightforward and easy to use. It offers a clear display of both the system and GPS time, making it useful for those who rely on GPS time synchronization. The millisecond difference between the system and GPS time is a useful feature for those who need to monitor time accuracy. However, it would be great if the app provided more features or customization options.