Magic Tricks

This is nice, and very easy to learn and perform.
It does require something "extra" to perform it, which isn't really mentioned in the description (actually makes you think maybe a gimmick is supplied, but obviously can't be with a download-only trick). It is something that is easy to acquire, even for laymen, so I won't knock it too much for that issue, but also cannot give it a full 5 with that in mind.

I do recommend this, as it checks off all boxes that a good, simple, hard-hitting affect needs to have.