This application works in pair with the "Custom wallpaper" application available on Samsung Store. It enables you to crop an image thus creating an image with a 360x360 pixels resolution which can be transferred to your Samsung Gear S3/Sport smartwatch.
After you transfer the obtained image you can select it in the "Custom wallpaper" application on your smartwatch. Your wallpaper ( background ) image of your Samsung Gear S3/Sport will be changed with your selected image.

If this application does not work on your smartphone please let me know.

Instructions:
1. Download this application and search on the internet or on your devices for an image that you would like to have as wallpaper for your smartwatch.
2. Transfer the desired image to your smartphone and select it in this application.
3. Crop the image using this application. Note that according to the initial resolution of the image you might not be able to select the entire image as output image.
4. Save the cropped image on your smartphone memory and transfer it to your smartwatch using the Samsung Gear application.
5. Download the "Custom wallpaper" application on the Samsung Store open it and select the image you transferred to your smartwatch.