What's New

Fixed a few critical graphics glitches occurring on newer iOS devices (iPhone 5S, iPad Air), and some crashes related to dialogs.
Improved opening/closing of community view.
Added more links to help resources.

App Description

Welcome to the world of Principia.
Solve puzzles using the laws of physics. Help the robot get to the goal by building contraptions, bridges and vehicles.

Open up the sandbox editor and use over 190 unique objects to create anything from a simple teeter totter to a working calculator. Use the advanced electronics system to create your own games. Upload your creations to the community website or download creations by others.
Join thousands of other players and compete in the weekly Building Contests!

Play freely in the Adventure mode, explore worlds and progress by gathering resources and constructing objects that can be used to build anything you can imagine.

iPhone Screenshots

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iPad Screenshots

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App Changes

  • March 05, 2014 Initial release
  • April 23, 2014 Price decrease: $3.99 -> $0.99
  • April 30, 2014 Price increase: $0.99 -> $3.99
  • May 04, 2014 Price decrease: $3.99 -> $1.99
  • May 16, 2014 Price increase: $1.99 -> $3.99