This document contains the sources and disclaimer for the Bank Interest Calculator app available:
The computation of maturity amount for RD is based on the formula in http://www.iba.org.in/formula.asp.
Currently we fetch Currency rates from the API provided by open exchange rates. Terms of usage of open exchange rates: https://openexchangerates.org/terms/.
The rates between two currencies xxx and yyy are computed by using the ratio of their values against USD, that we fetch from the open exchange rates API. Hence this might not be exactly the value of exchange between xxx and yyy.
This application comes with no warranty. Exchange rates provided for informational purposes only and do not constitute financial advice of any kind. Although every attempt is made to ensure quality, no guarantees are made of accuracy, validity, availability, or fitness for any purpose.