Fannie Launches Mobile App. Fannie Mae launched a new educational tool this week called HOME by Fannie Mae. The GSE said the mobile app helps educate future homeowners about the steps and responsibilities of buying and owning a home. With the app, potential homebuyers can figure out what they can afford, understand their monthly mortgage payments, how to save for a downpayment, and learn how much they can save in interest by making extra mortgage…