LensKit is a useful application that will turn your iPhone into a multi-purpose photography utility. Easily calculate Depth of Field and hyperfocal distances for any focal length, aperture, and crop factor combination. A simple shift to landscape mode presents a useful diagram of all calculated distances.

There is also a crop factor calculator. Now it is easy to calculate the focal length equivalent for your 85mm lens on a 1.3 crop factor body. The sample coverage field is illustrated as you adjust the crop factor slider.