Structures is by an MIT lecturer and professional structural engineer who thought there must be a better way to teach a conceptual understanding of structures with all the benefits of an iPhone or iPad.

So, instead of arrows or long descriptive paragraphs, Structures presents a wide range of images and animations all colored with the forces that are in the structure itself. Even better, the images and animations are linked so you can compare related concepts to learn more. So you’ll see how arches buckle based on thrustlines that are the opposite shape of a cable, how bending moments in beams and frames are generated, and even how prestressed beams work! All the ideas build on each other and Structures guides you through it all.

Structures is the perfect app for architects, designers, artists, students, and anyone interested in learning more. You can start at the beginning or jump in anywhere and enjoy this all-visual app!

Unique and engaging presentation of the basic concepts of structural behavior.
All structural forces colored consistently throughout the app.
Covers the simplest structural concepts and takes you step-by-step through to more complex structures.
Select side-by-side comparisons that build as you move through the app, always returning you to the fundamental concepts.
Explore and learn about: Cables, Arches, Domes, Columns, Trusses, Beams, Frames, and Prestressed Beams

What's New

Version 1.1

- Updated main app icon.

- Fixed rate-the-app link on app’s info page.

Ratings and Reviews

4.1 out of 5

19 Ratings

19 Ratings

Structures app


I thought the structures app was a great way to practice and review outside of class. My only complaint i wish it had a audio element so that i could listen and follow along during moments of confusion. Otherwise its a great app. Thank you

Thank you


Not an engineer; in fact, hopelessly math-challenged. This app is a wonderful intuitive intro to understanding structures. Both beautiful and practical, it pulls together (badly taught) concepts that have eluded me for years.


Alpha Dork

This app would be worth something if it was made of paper, and could be used as tinder for lighting a fire. Had it been free it would've been deleted from my phone with resentment for having downloaded it, having paid for it makes me feel as if I have been taken for a ride and the author/programmer is laughing mockingly at me.


Paul Kassabian
43.9 MB
Requires iOS 5.1 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© Paul Kassabian


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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