There is a new App that will calculate reciprocity failure and various other types of exposure compensation. It is designed for the iPhone, but I have used it on an iPad and the graphics are fine when the interface is doubled in size.
The App has been the subject of discussion on the New Products sub-forum for a few months now, and the developer has been extremely responsive to comments and requests for features from forum participants.
He just released the latest version, and I thought that it might be a good time to mention it in the appropriate part of the main forum where more people are likely to see it. After all, it is at this point not a new product. Or maybe the moderators would consider moving the discussion to the main forum, in which case this thread could be deleted.
The discussion in the New Products section is at: http://www.largeformatphotography.in...ad.php?t=80133