What's New

1. Rebuilt with the latest Xcode and iOS.
2. Made some miscellaneous improvement.

App Description

This app is used to convert numbers among decimal, hex, binary and gray code. If a user changes any one of these numbers, the other ones will change accordingly. It is a handy calculator for engineers to obtain the binary or gray code values from a decimal, or vise versa.
In addition, an animated solution of a Hanoi Tower with three disks is also demonstrated based on the input number.

iPhone Screenshots

(click to enlarge)

Graycode screenshot 1 Graycode screenshot 2 Graycode screenshot 3

iPad Screenshots

(click to enlarge)

Graycode screenshot 4 Graycode screenshot 5 Graycode screenshot 6 Graycode screenshot 7

App Changes

  • June 14, 2014 Initial release
  • March 01, 2015 New version 2.3
  • March 08, 2015 Price decrease: $0.99 -> FREE!
  • March 08, 2015 Price increase: FREE! -> $0.99
  • March 17, 2015 New version 3.0
  • June 14, 2019 New version 3.2
  • June 16, 2019 Price increase: $0.99 -> $2.99
  • December 17, 2019 New version 3.3
  • October 23, 2020 New version 3.4