xSpectre has developed a miniature spectrometer that fits in your pocket and is operated by your smartphone.
(From xSpectre web page): xSpectre’s Pocket Laboratory (PockLab) comes with a modeling tool for translating the spectral signal to a label of content.
Apart from analyzing everyday items like food and drinks, garments and fabrics, xSpectre’s PockLab can also be integrated in production environments for monitoring and process control.
NB: The cover picture shows one part of the spectrometer, not the full product.
Read more at
xSpectre Spectrometer web page