The Electronic Circuit Constructor is an instrument of electrical schemes creation and testing. Main purpose of the app is to assist in learning basics of Electrical Engineering and Circuit Theory. There are easily recognizable control elements in the main workspace of the app. The upper row contains six simple electronic elements: a motor, a resistor, a wire, a switch, a cell and a lamp. The elements are draggable and can be placed on dielectric plate attached to contact points. Below plate there are instruments of exploration: ampermeter, voltmeter and “Properties” section, where user can watch (and change as needed) properties of elements on plate such as resistance, voltage etc. The App was created for Microsoft Appathon-2013 and won 1-st prize. #PIL.APPATHON