A free program for Android, by Smart Theme.

Launcher for Android 11 is an awesome personalization app for your Android phone. It will change the look of your phone with its awesome theme and a list of HD wallpapers and themes. It will also provide a list of Top-Ranked and Most Visited wallpapers so that you can choose the best wallpaper based on your preferences.

This is how you can use the app:

To download the app, you need to have an Android phone with Android OS. 

Once you have the app, you need to open it.

You will see a list of wallpapers and themes on the left side.

Choose the one you like.

To save the image, click on the image and then on the save button.