SdSpace is a free utility widget developed by mazsoft for Android 9.0 devices. It is designed to help you monitor the available space on your SD card. The widget appears as a small icon on your desktop in the shape of an SD card, displaying the percentage of free space available on your SD card.

Clicking on the widget will open up the SD-memory and internal-memory stats, allowing you to view more detailed information about your device's storage. It should be noted that the percentage displayed on the widget is rounded.

It's important to mention that the app is quite old and may not work well on new smartphones. However, you can add the widget to your device by accessing the widget section in your app drawer or by long-tapping on the desktop, depending on your Android version.

Overall, SdSpace is a simple and straightforward tool that can be useful for those who need to keep track of their SD card storage space.