Time for a new app recommendation today ! A while ago, it was suggested to me in a comment on this very blog, and when I saw the description in the iTunes Store, I was immediately enthusiast. It’s called the Fast Counter.
It’s basically the app that does the annoying job of colonies on petri dishes. Look at that :
I had time to try it out a bit , by taking a classic LB plate with bacteria after transformation (about 200) and tried to count. You can set the threshold, and the color of the background; and once this is done, it is pretty effective. It does capture -LIVE- your colony number (is it the future already, right ?), but you can also take a snapshot, and count “manually” by tapping on them.
My point is, if you need a good estimate, and not a super-super-precise count (which is generally not required anyway), you should definitely try it out.