Wild About Math! Making Math fun and accessible

24Aug/10Off

Apollonius geometry iphone app: free to first 5 commenters

[ Update: All 5 free apps are gone but you can buy one for $3.99 at Itunes. ]

Adolfo Rodriguez has created an iPhone/iPod Touch/iPad interactive geometry app called Apollonius. It can be described as a simplified touchscreen version of "Cabri" or "The Geometer's Sketchpad."

Adolfo is giving away five copies of the app.
[youtube]http://www.youtube.com/watch?v=cT-Duqz5vNE[/youtube]

Apollonius is the first (and so far the only) Interactive Geometry Software (IGS) for the iPhone and iPod Touch. It allows you to make geometric constructions (such as those made using a compass and straightedge/ruler) and move their parts smoothly using the device's touchscreen.

Apollonius was inspired by similar software for personal computers, such as Cabri and The Geometer's Sketchpad.

An example of a simple construction that can be made with Apollonius is a triangle with its medians, heights, and angle bisectors. Moving the vertices of the triangle will then simultaneously move the medians, heights and angle bisectors accordingly.

Apollonius remembers your last construction when the program is closed. It also allows you to ZOOM and SCROLL your construction, providing a very large virtual screen.

New versions will start appearing soon with great new features, so make sure to visit this page once in a while. Updating to a new version is FREE once you have bought the app!

About IGSs: Interactive geometry environments are powerful tools in the development of problems and conjectures in planar geometry. They have also proven to be very useful as educational tools.

Here's a link to the app.

If you're one of the first five people to leave me a comment I'll give you a code for a free download. Be sure to leave your email address in the email field in the comment form. And, if you like the app, be sure to rate it.

[ Update: All 5 free apps are gone but you can buy one for $3.99 at Itunes. ]

Comments (5) Trackbacks (0)
  1. Awesome! My kids would love that!

  2. That looks like a very interesting and entertaining application! I wonder how many other math related ipod-iphone-ipad apps are there.

  3. Great idea – would like to test it and recommend to students

  4. Sol-This looks like a nice little app for teachers. I (and my HS sons) would love to try out one of those free downloads.

  5. I’d love a copy! Big fan of interactive geometry software…


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