You have no idea how useful the app is until you actually start using it.

a man wearing goggles says the power of the sun in the palm of his hand

ALT: a man wearing goggles says the power of the sun in the palm of his hand

I also don't know about others, but I'm a huge suckered for graphs and charts. The tag chart doesn't work the best if you're like me and break every card down by their effects, but you can sort the deck by your tags as well.