Quote Originally Posted by Moopheus View Post
How would the cost compare to buying a DA or RH timer? If it is not much cheaper, is there some other advantage?
The advantages are that it is open source (if you want it to do something extra, just change the code yourself), a smartphone/tablet provides a much richer user interface and more processing power than the simple devices being sold as darkroom timers. They can become significantly smarter.

For example, you could use the built-in camera to look at the enlarger output on the baseboard and from that, choose a printing grade and some dodge/burn suggestions (illustrated on the screen!) that will result in a fairly well-balanced print. The possibilities are hugely expanded.