Choose between Decimal to Binary or Binary to Decimal conversion.
In Decimal to Binary, increment or decrement the number, press convert, and it will show you the binary representation of the number.
In Binary to Decimal, add a zero or a one to the number, press convert, and it will show you the decimal representation of the binary number. If you make a mistake, press clear, and it clears the number.
This app is free and requires no payment.