The free app "Unit Converter" is easy to use and allows you to convert between various units of measurement, such as kilometers, feet, inches, yards, and tons.

This app is perfect for anyone who needs to do basic calculations and conversions. It supports tons of different units, from kilometers and miles to pounds, ounces, and tons. It has 15 unit categories you can convert to, with over 350 units available.

You can also convert for over more than 150+ world currencies, and you can do this offline. The interface is smooth and simple to navigate as well, making you convert what you want in no time.