Do people know how money is printed? But that does not stop notes from being an easy to use tool.

The underlying principle of this idea is not easy to understand. But to use it, you don't have to understand everything. In most cases, you just check wether it looks good or not like you check notes. And you will rarely need to use an Android phone with an easy to use app to tap it and the app will tell you how much Litecoin this card contains. You don't need any username or password. Just tap it. Nothing is really complicated, right?