The Reckoner - Multi Calculator app is a handy app that can be used to calculate various mathematical and financial concepts. The app can be used for advanced calculations and supports several currencies.

The app includes various options to calculate your body mass index (BMI), compound interest, weekly finance, and many more. It also has an option to select whether the currency is to be calculated in Rupees or Dollars, and you can also save the calculated history records.

You can convert the different currency rates at one place, and you can use the unit converter to convert between various units. The app also supports multiple languages, and you can choose the language according to your preference.