A free app for Android, by Unii.
Mana Calculator is an application that helps you count the number of lands for your MTG decks. The app allows you to choose any combination of the six types: white, red, blue, black, green, and colorless. The application also allows you to choose from three different sets of spinner wheels: red, blue, and black.
How to use it:
Mana Calculator was designed in a very simple way. To use the application, you just need to set how many lands you want in your deck. Then, you need to count the number of mana symbols in your deck. If you are not sure how many symbols there are in a deck, just count them. Then, you need to set the spinner. You can use it for any combination of the six types and three sets of spinner wheels. After that, you can check how many lands you have in your deck for any of the six types.
The application also allows you to check from which guild you are:)
It is an unofficial app for calculating the number of lands for your MTG decks. It was developed as an extension of MTG Tournament Calculator.