A new Fs laser writing regime without heat accumulation enables the use of a smartphone to expand the potential spectroscopy application growth. The process creates a spectrometer capable of covering the visible band from 401 to 700 nm with a 0.4 nm/pixel detector resolution and 3 nm optical resolution. The proof of concept paves the way to in-the-field absorption spectroscopy for quick information gathering. The keynote speaker, Jean-Sébastien Boisvert, will discuss the research process, potential next steps, and the remaining challenges.