# Deflection — Frames, Trusses, & Beams

> Structural analysis calculator for beams, trusses, and frames with stress visualization. (iPhone/iPad app by Blue Ketchep.)

- Source: https://appshunter.io/ios/app/deflection/id670400597 (this page in markdown: same URL + `.md`)
- Developer: [Blue Ketchep](https://appshunter.io/developer/1131834248)
- Category: Productivity, Education
- Price: $4.99
- Rating: 4.60/5 from 115 App Store ratings · 91 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 160 MB
- Languages: American English, Dutch, French (France), German (Germany), Italian, Japanese, Korean, European Portuguese, Russian, Chinese (Simplified, China) and 3 more
- Released: 2013-07-16
- Data updated: 2026-08-25
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/deflection/id670400597/reviews.md

## What is Deflection?

Deflection is a powerful, versatile calculator for beams, 2D trusses, and 2D frames.  The interface is simple and intuitive, and the graphical output is state-of-the-art.  In addition to reaction, shear, bending moment, and deflection results, Deflection also computes internal shear and bending stress along the cross section and along the beam.

2D FRAME AND TRUSS EDITOR

The 2D editor is seamlessly integrated with the beam editor.  Draw arbitrary frame and truss structures and apply loads and constraints using the same simple interface as for beams.  You can visualize results directly within the 2D editor, or you can select a beam and get additional insights. 

INTERNAL STRESSES

Obtain internal bending and shear stress diagrams in addition to shear, bending, and deflection diagrams.  The internal stresses can be visualized along the length of the beam as well as along the vertical axis of the cross section using the beam editor.

CROSS SECTION EDITOR

Edit built-in cross sections.  Moment of inertia and area values are automatically calculated and applied to the rest of the beam calculations.

MORE FEATURES

• The built-in database contains more data for your reference and convenience.
• Apply beam self-weight optionally
• Unlimited design files
• Quick-start templates

CONTACT

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

## Key features

- Beam, 2D truss, and 2D frame analysis
- Graphical output of results
- Internal shear and bending stress calculation
- 2D frame and truss editor
- Cross-section editor with automatic calculations
- Built-in database and quick-start templates

## Recent user reviews (10 of 91)

All indexed reviews: https://appshunter.io/ios/app/deflection/id670400597/reviews.md

### 5/5 — How to change 3d to 2d

*2025-03-29, version 11.0.0*

Idk

### 3/5 — Pro 버전

*2024-12-04*

가격을 쫌 낮춰주세요 ㅠㅠㅠㅠㅠ

### 1/5 — Unausreichend

*2024-11-02*

Keine in Deutschland üblichen Stahlprofile. Fließgelenke oder ähnliches lassen sich nicht einfügen... Ich habe mein Geld rausgeschmissen.

**Developer response:** Wir können Ihre Fragen zur Verwendung der App jederzeit beantworten und Ihnen bei einer Rückerstattung helfen, wenn Sie uns direkt unter contact@ketchep.com kontaktieren.

### 4/5 — Buena App

*2024-08-03, version 9.0.0*

Después de un problema por no interpretar bien mis datos, di con la solución. Ahora tengo dificultad con la edición de longitud en el módulo de cerchas 2D, que entiendo me resolverán

### 5/5 — Matrices

*2024-05-30, version 9.0.0*

Me podrían ayudar si la app también me ayuda con las matrices de rigidez, identidad y transpuesta, de las vigas?

### 1/5 — No tutorials

*2024-04-18, version 8.1.1*

I don’t know how to use your app, waste of money

### 5/5 — Muy bueno

*2023-06-19, version 6.2.0*

Muy bueno, me sirve bastante en resistencia de materiales y análisis estructural.

### 2/5 — How i can change language .

*2022-11-12, version 6.2.0*

😂…

### 5/5 — ¡Excelente!

*2022-07-24, version 6.2.0*

Es una excelente aplicación, para cuando se requiera analizar una viga de forma rápida o no se tenga a la mano un software especializado. Tiene una interfaz muy dinámica, aunque puede mejorar en algunos aspectos. Ojalá en actualizaciones futuras los esfuerzos en la sección puedan verse en kg/cm2.

### 4/5 — Flexural Rigidity (EI)

*2022-05-25*

Would be great if there’s an option for different EI at different span.

## Frequently asked questions about Deflection

### What kind of structural analysis does this app perform?

This app performs structural analysis for beams, 2D trusses, and 2D frames. It calculates reaction forces, shear, bending moment, and deflection. It also computes internal shear and bending stress along the cross-section and the beam.

### Can I design custom cross-sections?

Yes, you can edit built-in cross-sections using the cross-section editor. The app automatically calculates moment of inertia and area values, which are then applied to the beam calculations.

### Is this app free to use?

Based on the provided information, the app is a paid application. It does not have in-app purchases or advertisements, indicating a one-time purchase model.

### What are the main benefits of using this app for structural analysis?

The app offers a simple and intuitive interface with state-of-the-art graphical output. It provides detailed results including internal stresses, and features a seamless 2D editor for frames and trusses, along with a built-in database and templates for convenience.

## Version history (last 5 releases)

### 11.0.0 — 2025-03-19

Introducing frame and building benchmark examples and extensive improvements throughout the app!

• NEW: Examples gallery in the home screen, including new examples for frames and buildings.  Click on the button with a book icon to open it.

• NEW: The new eyedropper button in the frame editor allows you to copy the material and cross-section from one beam to another.  To use it, select a beam, press the eyedropper button, and then select another beam to copy from.

• FIXED: Cross section stress analysis for angles and zees is now performed along their principal axes rather than geometric axes.

• IMPROVED: Numerous performance, stability, layout, and interaction enhancements in the 2D editor, especially when working with large models.

Thank you for your continued support and feedback!  Reach us at contact@ketchep.com with any questions or comments.

### 9.0.0 — 2024-04-18

• NEW: Shear, moment, and axial force diagrams can now be displayed for 2D frames and trusses.  Use the buttons at the bottom of the screen to display or hide the diagrams.
• IMPROVED: On iPad, the side panel in the 2D editor can now be collapsed to make better use of screen space.
• FIXED: Minor issues.

### 8.1.1 — 2024-02-22

Minor fixes

### 8.1.0 — 2024-02-14

• NEW: 2D frame and truss editor.
• NEW: Added Mexican cross section data.
• NEW: In the classic beam editor, you can now rotate the beam and the forces applied to it.
• IMPROVED: Performance while dragging loads.
• IMPROVED: Formatting of exported report (via share link).
• FIXED: Minor issues and improvements across the app.

### 7.2.0 — 2023-09-29

• IMPROVED: Vastly improved translations for all languages.
• IMPROVED: Screen color contrast and addressed minor issues throughout the app.

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## More apps by Blue Ketchep

- [Deflection Lite](https://appshunter.io/ios/app/deflection-lite/id974474071)
- [Cross Sections](https://appshunter.io/ios/app/cross-sections/id1027674675)
- [Deflection Pro](https://appshunter.io/ios/app/deflection-pro/id1217160203)

All apps by Blue Ketchep: https://appshunter.io/developer/1131834248

## Related topics

[deflection](https://appshunter.io/ios/topics/deflection) · [beam deflection calculator](https://appshunter.io/ios/topics/beam-deflection-calculator) · [deflection lite](https://appshunter.io/ios/topics/deflection-lite) · [deflection pro](https://appshunter.io/ios/topics/deflection-pro) · [sw truss](https://appshunter.io/ios/topics/sw-truss)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-25.*