PhET Interactive Simulations is described as 'Founded in 2002 by Nobel Laureate Carl Wieman, the PhET Interactive Simulations project at the University of Colorado Boulder creates free interactive math and science simulations' and is an app in the education & reference category. There are six alternatives to PhET Interactive Simulations for Web-based, Android and Android Tablet. The best PhET Interactive Simulations alternative is Experimenters Circuits, which is free. Other great apps like PhET Interactive Simulations are LabsLand, EMANIM Online, Amanogawa.com and myPhysicsLab.