With every Iphone, you get a free negative viewer. I like contact sheets myself.
Y'all should warn a brother when you resurrect threads. I started reading the first post and did a double take to make sure I wasn't in the twilight zone....
When in the darkroom, it is much more convenient to call family members through the iphone than to yell to them from the basement to the 2nd floor!
I now swear by the massive development chart, i now use it all the time, but i put it in "plane mode" just so i do not get called during film development.
I bought the MDC app for Android. I love it, too.