I use studio goya apps. While the classic sudoku app of theirs is 5 dollars, I believe it is well worth it.

I came here to say this. A chunk of mass that "weighs" 100 grams is still 100 grams on the moon. A chunk of mass that weighs 1 pound does not weigh 1 pound on the moon.

I don't smoke, I just like melting things

Ahh dude, I didn’t notice that perfect alignment. That awesome!