At this time, there were many small components to make electronic equipment such as TVs, smartphones and others. This electronic equipment uses passive components and active components. The physical size of the capacitor decreases gradually becoming smaller. Capacitors store energy in the form of charge. If there are two equal charges (for example a positive charge and a positive charge) then both charges will refuse. Conversely, if there are two different charges, they will attract each other. The purpose of this research is to create an Android-based software that can calculate the remaining charge after the discharging process. The method used is to use the calculation method of discharging capacitors. The results of this study found that the calculation can be done well and also the presence of errors in the software design process.