Now in BlackBerry AppWorld you can download the Binary Clock app for free. This app displays the time as a binary coded decimal, with the hours, minutes, and seconds of the day displayed in the colour of your choice.
How to read
A binary coded decimal can be read with each column added up with each light worth (from top to bottom) 8, 4, 2, and 1, and the column on the left being worth 40, 20, and 10. For example the time in the above image would be 16 hours, 9 minutes, and 25 seconds.
Supported Devices
This app requires a minimum OS of 4.6 and supports the 8330, 8350i, 8520, 8530, 8900, 8910, 8980, 9300, 9330, 9500, 9520, 9530, 9550, 9630, 9650, 9700, 9780, and 9800.