This app will help you with calculating the number of lands for your MTG decks in sealed tournaments.

Mana Calculator helps with choosing different lands to your deck: white, red, blue, black, green and colorless (6 types, colorless after oAuth of the Gatewatch).
An application is easy to use for beginners and advanced MTG players in sealed games (drafts, prereleases, etc...).

Easy use:
1. Set how many lands you would like to have in deck/ library
2. Count the number of mana symbols in cards in your deck and move spinner accordingly
3. Check how many lands for selected colors should be added deck
In addition you could check from which guild you are :)

Mana Calculator was written as an extension of MTG Tournament Calculator