Of course its all "plausible" and we all yearn for a Star Trek Tricoder, but spectrometer measurements have to be taken under controlled conditions with careful

Of course its all "plausible" and we all yearn for a Star Trek Tricoder, but spectrometer measurements have to be taken under controlled conditions with careful calibration or else you're going to get garbage-in/garbage-out. That said, it sounds like harmless fun. But if you really care about accuracy, its not that hard to assess the quality of fruit and vegetables with your own senses, don't need a spectrometer/iphone contraption.