Native applications for the iPhone and the iPod Touch are arriving in droves at the iTunes App store. However, there are very few clock apps, and only one of interest to 24 hour clock fans. It’s called Sol, written by Alexander Valys, (web site http://sol.avalys.net/). It’s an elegant sun clock showing the rising and setting times of the sun for a number of locations, on a 24 hour dial (12 noon at the top, 24:00 at the bottom).