Mutuo is a free Android app developed by Giuseppe Romano, designed for those who need to calculate their mortgage rate, interest, and amount. Mortgages are the most common form of loans, and this app makes it easy to calculate all the necessary data. The app is user-friendly and straightforward, and you can calculate a fixed-rate mortgage by entering the required data. For a variable-rate mortgage, enter the indexing rate (e.g. Euribor three months) plus the spread. For example, if the Euribor three months is 4.75% plus a 1% spread, enter 5.75% in the rate field. Mutuo is a convenient tool for anyone who needs to compare mortgage rates or calculate loan payments.