Big DeskClock is a free desk clock app for Android developed by Jinku. It displays the current date and time at your location and has several features to make it a useful tool for your device.

The app has a unique feature of notifying the current hour by voice. It can also notify you in the screen-off state if you set it up. Additionally, it has an alarm feature that speaks the current time, but it only works when the app is running. If the app is not running, you can use the default alarm app on your device.

Big DeskClock can automatically start when your device boots up or when it is plugged into a power source. However, this feature cannot be operated over Android Q version. It can also automatically exit the app when the device is unplugged from a power source.

Overall, Big DeskClock is a simple yet useful app for those who want to turn their device into a desk clock.