It is an app having mainly two features of interest:-
1) Interest Calculator helps in finding the interest easily without the need to count the days between two dates with built in support of two types of interest - 30 Day Month Type and Year Type
2) Interest Manager helps in saving the ledgers whom money is borrowed from or lent to and helps us to track transactions related to them.

It is a good app to be considered for financial people and also for people who want to find interest easily.