A free app for Android, by Creatyf.

Financial Calculator – Loan, Payment, and Investment is a useful application that lets you perform various calculations related to finance, such as calculating the amount of money you will have to pay in order to acquire something, the amount of money you will have to invest in order to get your desired return, the total amount of money you will have to pay in interest in order to get your desired loan, the amount of money you will have to pay to the lender in order to receive your desired loan, and much more. All these calculations are very easy to perform using this application, which is designed to be used by people who do not have any prior knowledge of mathematics or finance.