SkinCalc is a very complete and professional calculator that has the most complex and advanced mathematical operations and functions that you can imagine, coming equipped with everything you can ask any calculator of these characteristics.
Undoubtedly, SkinCalc's biggest attraction is that it has more than 100 different skins (some of them with transparency effects) to aesthetically customize it and continually change its appearance.
When you have tired of these 100 skins, you have many more on the author's website to download them.
You can free download SkinCalc 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.