Lot of good smart phones these days come with basic photo editing features. Also, smart phones these days have so many features and special effects which can be used to take pictures, most average home users or hobby photographers can just get buy with the pre-loaded tools in their smart phones. A very few that need to do some editing like photo cut out or clipping path (bild freistellen) need to find a free tool that they can use on an occasional basis to edit photos.
One good tool that is being extremely popular these days is GIMP. Hobby users will find all they need to do in this tool as it is loaded with various option that allows to do you pretty much all a hobby user need to do. Only thing this tool lacks is enough tutorials covering various topics. Lack of enough tutorial is preventing this tool being more widely used.
So if you are a hobby photographer looking to get a tool that is free and works just fine for simple use like clipping path or photo cut out, minor editing and photo retouching, then give this tool a try. Youtube has some tutorials, doing a google search will also land you on some more tutorials. With a little reading and a little practice, you will find yourself comfortable with the tool to do your photo editing like clipping path and photo cu out.