Deflection Lite 4+

Beam Calculator

Blue Ketchep

    • 4.3 • 40 Ratings
    • $0.99



Deflection Lite is the most interactive, fast, and precise app available for structural beam analysis. Simply drag loads and supports on the beam, and see how it bends.


Calculate reactions, shear force, bending moment, and beam deflection quickly and easily.


Specify elastic modulus and moment of inertia values directly, or find common shapes and materials using the built-in databases, which include most international steel sections, as well as some aluminum and wood shapes.


Simply drag any load or support on the beam.

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


• Export your design to a permalink that you can share.
• Automatic detection of local maxima and minima in diagrams
• Metric and standard measurement units


We like to hear from you! Please email if you have any issues, questions, or comments.

What’s New

Version 8.1.1

Minor fixes.

Ratings and Reviews

4.3 out of 5
40 Ratings

40 Ratings

Happy2000 ,

Needs better instruction and step-by-step wizards

Needs better instruction and step-by-step wizards. Maybe it works, maybe it doesn’t, who knows — so hard to figure out the unintuitive UI that you never quite know what it’s doing. Honestly, needs a redesign with some stronger UI folks.

Developer Response ,

Our apps are designed for competent structural, mechanical, and civil engineering professionals with years of training and experience using similar tools in the industry. Deflection Lite contains only a subset of the functionality and complexity that the other tiers offer. We are reachable by email to answer questions, provide documentation, and help process refunds.

clarkkurt ,

Clumsy UI

Clums y UI coupled with limited functionality has me looking for something better.

Developer Response ,

Thank you for your honest feedback. If you would like to share more details with us by emailing, we would try our best to address them. We look forward to hear from you!

jsd27764121672 ,

Civil engineer

Terrible app, what a pain in the neck to use. Poorly designed application, please refund my purchase.

Developer Response ,

We continuously make improvements to the app based on user feedback, and we are sorry it did not meet your expectations. We would love to hear about your experience, and we can help you further if you email us directly at We look forward to hear from you!

App Privacy

The developer, Blue Ketchep, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • User Content
  • Identifiers
  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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