None of the cell phone cameras are that great for photography. Lenses are just too small. Add the magnifier and your depth of field just gets crushed. The screen size and DPI… well maybe not what you want when really trying to see what is happening at the edge.
I think the magnification is likely not really 10X. At least by looking at the one photo that you posted. You would be better off with a good 10X loupe.
If you want the gadget for it’s other functionality, I guess the magnification feature is a nice additional feature to have though.