Earlier version.
The Draft reads hybrid cards better: a card like {B/G} is paid with one of the two colors, not both. A card castable with black alone in a red-black deck is no longer penalised. The total cost of cards like {2/R} counts as 2.
If MOX does not know a card's cost it says so, instead of treating it as a zero-cost card.
The Counter takes your post-sideboard deck from what Arena reports, and warns you when it is not sure.
No new data leaves your computer.