This app constantly updates with every TCG and OCG leaked card allowing you to experiment with all sorts of things that you cant normally do on the go. A downside to this might be that they dont always get every single card, (I remember not seeing Honesty Neos for a long time when it was leaked, although admittedly, it was only confirmed for the OCG, though they do tend to get OCG cards right when theyre leaked) but its up sides certainly make up for its very short list of down sides.
penis lol about Yugipedia Deck Builder for YuGiOh, v1.8