Algodoo Play Store ((install)) -

★★★★★ 4.6/5 "I taught my 10-year-old about torque using this. He built a working crane in an hour." – Parent "The best $5 I never spent (Free with ads/ premium option). The physics is shockingly good." – Engineer "Endless creativity. It runs on almost any Android device." – Student

Leo didn't look up. "It’s a world where nothing falls unless I say so." He dragged a "thruster" onto a giant polygon and watched it blast into the top of the screen, bouncing off a ceiling made of bouncy rubber. "Can I try?" Algodoo Play Store