Is ML here needed? When I was working in a lab we used the opensource ImageJ for counting cells. It seems like it'd do a great job here too.
Why are we having this discussion? Why are people in HN amazed at this? What is wrong with the world where something like THIS is impressive?!?
ImageJ is suited to the needs of scientists and engineers. Perhaps one could craft a workflow using ImageJ but it would be much less integrated than the mobile app from the article.