I don't know the price of these timer, but 160$ is about what I evaluated.
Originally Posted by Moopheus
The really good thing about this timer is that it's linked to another application I've made, the Darkroom NoteKeeper http://www.droidinthedark.com/notekeeper. The exposure used to produce a print can quickly be saved in a database. For future reprint, the exposure sequence can be retrieved in a few clicks. The user interface of this timer is also very attractive and easy to use. Finally, I'm currently working on the development of a voice command interaction that will be available on the next major release.