A miniaturized device for colorimetry is presented that utilizes a LED array for illumination and a compact spectrometer for detection. It can be battery-powered, operated locally as a stand-alone device, or connected via wi-fi to the internet. It has potentials to be remotely operated by means of a tablet or a smartphone. In practice, it consists of a low-cost hardware configuration that is adaptable via software to the user’s most varied requests, as a spectroscopic platform appropriate for a variety of applications. The hardware and software modules can be designed with different performances, complexities and costs, with the aim of making the colorimeter a device for Internet-of-Things use. It will be suitable for a selected range of consumer applications, as well as for targeted industrial, environmental, and food applications.