Unfold

“More Johnson solids available in a future update.” — this app, 2 years ago. It's now August 2017.

I teach 7th grade math, and one of the concepts that students really struggle with at that age is trying to picture what a prism looks like when it is unfolded. I like how this app allows you to rotate the shapes so you can see them in different orientations and also how you can pause and reverse the folding and unfolding. The only change I'd like to see is the ability to change the dimensions of the rectangular prism. My students have to be able to construct nets with dimensions other than 1x1x1. Having this change would definitely make this a 5 star app!

I'd read about the snub dodecahedron. I'd been thinking about it before I went to sleep. I wanted to really get to know it. Searching in the app store brought me to Hangas' app. And it's great! I love all the shapes, the ways I can rotate and spin them, unfold them, color them. Within a half an hour I'd had 10x as much fun as the thing cost me. I played with it for many more hours. What I didn't anticipate was that my 9 yr old daughter would become entranced, too, and borrow my phone for hours to play with the Unfold shapes. Buy this app. Send him more money so he can complete some more of the Johnson solids, and add some more multi-color choices. And maybe add some textures to the color. Definitely textures.

This app is so cool! On one level it's just fun to look at the shapes, spin them, slowly unfold them, spin them while half-unfolded … but then it's also handy because I was never quite clear on just what a dodecahedron looks like. And who knew there were rhombicuboctahedrons out there? Now I have to show this to my daughter's math teachers! One more thing: what a cool tool bar! I was thinking that the UI was nice, simple, and to the point, and then I started rotating it … nice touch!

Is fun and very educational. Very well designed app as well. It would be amazing if we could select our own colors.