The All-In-One Calculator is both a calculator and a converter. It comes with 75 different functions (both calculations and converters), plus a scientific calculator. You can convert currency and various types of units, using this app.
In financial calculations, it includes Loan Calculator, Tip Calculator and a Simple / Compound Interest calculator. Health calculators, Date and Time and also Age Calculators are all part of the app.
The app looks really nice and colourful (with over 40 optional themes), and completely free to use. Maybe the only Calculator and Converter you need for your phone!
Android : http://bit.ly/2kb6u3o