Solve beam deflection problems easily and obtain results, graphs, and equations to double-check your work!

This is a great learning tool for mechanical engineering, civil engineering, and architecture students. It is an excellent companion for engineering statics and mechanics of materials college-level courses. While you should not rely on this tool for professional engineering design, you may still find it useful to double-check your hand calculations and results.


Quickly place loads and supports along the beam using a powerful interactive graphical design. Our solver algorithm will automatically handle individual sections and superposition of loads.

Immediately see how the beam bends in response to the applied conditions. The shear, moment, slope, and deflection diagrams and equations update automatically.


Each type of load and support has a different icon. You can simply drag any of them onto the beam.

• Concentrated point loads
• Distributed loads
• Moment loads
• Simple supports
• Fixed supports
• Fixed hinges
• Floating Gerber hinges


Either specify moment of inertia and elastic modulus values directly, or find common shapes and materials using the built-in databases.

• Steel: American and European shapes
• Lumber: American shapes
• Other materials can be used used with custom shapes.


Easily edit and rotate cross sections if the built-in dimensions do not quite match your use case. The beam properties are automatically recomputed and used by the beam deflection solver.


• Metric and standard measurement units
• Smart diagrams automatically detect local maxima and minima and zero-crossings.
• Your work is automatically saved in separate files so you can return to it in the future.
• Quick-start templates help you to start right away!


Issues, questions, or requests? Submit a review or email

What’s New

Version 5.5.0

This release enables internal stress calculation--a highly requested feature--and fixes interaction issues and other rough corners from the previous iteration. Thank you for your support, for using our app, and for all your thoughtful comments since the last release!

• NEW: Internal stresses are now calculated when a cross section is specified and the beam conditions are solvable. Even if the beam is not fully solvable, when the app has enough information to generate a dimensionless stress profile for the cross section, the vertical profile charts will display without numeric quantities. In all, four new internal stress diagrams are available. The internal shear and bending stresses for the cross section (in the vertical direction) are displayed to the sides of the cross section editor. The shear and bending stresses for the beam (in the longitudinal direction) are displayed with the other longitudinal diagrams when the buttons at the left of the diagrams are tapped. These buttons toggle between shear force and internal shear stress and between moment and internal bending stress, respectively.

• IMPROVED: As many of you reported, it was very easy to accidentally touch the beam model while scrolling up and down, causing undesirable edits. We addressed this issue by now requiring you to tap (select) a load before being able to drag it. This required a lot of re-tuning to make sure the editor still feels responsive without making it overly sensitive as it used to be. We think we got it right, but please let us know!

• IMPROVED: We improved the automatic detection and labeling of relevant points in charts to make sure you easily get the information you need. We did this by reduced the noise and re-prioritized local optima labeling. Determining the maximum shear or bending stress on the beam from the plots should now feel like a breeze! (More streamlined consolidated reporting to come in the future too!)

• NEW: You can now find some data on British and Canadian shapes in the section library. (A cross-over from our other app.)

• IMPROVED: It's now possible to specify which shape libraries to use in the catalogue (via the Settings screen). The current options are United States (US), Europe (EU), Great Britain (GB), and Canada (CA). More countries and data to come in the future!

• FIXED: Under certain situations, the app would crash while browsing the cross section library. Hopefully you never experienced this problem, but it's now fixed.

We want to hear from you! Issues, questions, or requests? Please submit a review or email

Ratings and Reviews

4.5 out of 5
46 Ratings

46 Ratings

8Way ,

Needs polishing

Kinda klunky interface. The calculator layout is poor. Calculator needs means of entering scientific notation. Missing aluminum extrusions. Should have a way to favorite beam shapes and add user defined ones. I prefer scientific notation normalized to be x.xx x10^x not xxx.x x10^x

Not sure why 10x length limitation.

Developer Response ,

Thank you very much for your detailed feedback and requests! We always have to make a tradeoff between polishing existing features and rolling out new ones, but over time we try to address all sharp corners, so thanks for pointing some of them out!

Regarding the 10X requirement: The equations that the app uses internally assume that the beam is "slender", meaning that the length-to-height ratio should be greater than 10. If you need to design for something shorter, you may need to use a different type of analysis tool. You can find a mention of this in the general Wikipedia article on Beam Deflection

benyamin 5s ,

it can be better

it should have angle for better experiment

Developer Response ,

Thank you for your feedback! This will help us prioritize future work.

If you have any specific use cases for angles in mind, please don't hesitate to send them to us at . This will be helpful as we design and implement future functionality.


Good try, but half finished app!

OK not meaning to put the dev down as this is a nice approach but I think the dev should have spent more time making the app workable than playing with the interface. The app is so called "version 5.0". One would assume from this it would have passed through four major iterations to get to this point. The app feels like beta release 0.9.
The following are missing.
1. Save and file functions
2. Undo and redo
3. A "help" or tutorial.
Also what would be nice would be the ability to design or draw beam sections instead of using the only ones offered. All that is provided is a database of standard sections downloaded off the internet, this would have been provided by version 3 or 4.
The app feels like an engineer grad student trying to show off the engineering knowledge. Any of the five star reviews are either friends of the dev or purchasers of previous versions who are happy to see progress.
If I have misrepresented the dev and invite them to contact me and I will revise my review.


Seller, LLC
30.8 MB

Requires iOS 11.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, Chinese, Dutch, French, German, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish, Traditional Chinese, Turkish

Age Rating
Rated 4+
© 2010-2019, LLC


  • Family Sharing

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

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