As a gardener, I could really use something like this Plantix app. I do my best for the amount of experience I have but sometimes diseases and pests can really stump you, and you just don't know how to solve the problem.
This really opens my eyes about other possibilities a smart phone app similar to this one could be used. Just think of the possibilities... We could one day have apps that diagnose skin conditions like eczema, fungal infections, etc, or maybe even an insect bite identifier.