The MTG Mana Calculator tells the user how many basic lands to put in their deck based upon the number of mana pips for each color in their deck and the number of dual lands in their deck.
Current Status: 1.0 Released ($1.99).
Supported Devices: iPhone 6 || iPhone 6 Plus || iPhone 6s || iPhone 6s Plus || iPhone 7 || iPhone 7 Plus
Screen Shots (iPhone 7)
(Opening page with mana pip explanation and warning)
These next three screen shots show the process of determining a mana base in the app.