Electrochemical detection using a smartphone was carried out with the NFC potentiostat, a compact device the size of a credit card, controlled by an Android system. The potentiostat integrated in the SIC4341 microchip serves essential functions, acting as a controller for the potential waveforms as well as a real-time data collector suitable for several electrochemical applications. This system operates as a potentiostat when connected to an NFC-enabled smartphone with the Chemister application installed.