A vs Deflection
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
A
Analyze 2D truss problems quickly on your mobile device. Create standard or custom truss structures, manage material properties, and generate PDF reports with flexible unit options.
- Standard truss templates (18 types)
- Custom truss creation
- Flexible unit system
- Built-in material library
- PDF reporting and email export
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The easy and fastest way to analyze the 2D-Truss problem right on your iPhone & iPod Touch. Featuring: • Standard Truss Templates: with the standard truss template (18 types of truss for initial version) , you can easily create and config your truss as required. • "Custom Truss"; If the built-in standard truss template doesn't match your requirement, "Custom" your own Truss is also easy to create due to the Node & Element generating features. • Unit Flexibility: very flexible in Units system, you can choose any units at your convenience without the requirement to restart the application and the unit system is saved per your truss's project. For example you use m. as node coordinations while you choose mm. for the deflection of the nodes or you can even choose in. or ft. for nodes's deflection (if you really need). • Buit-in material sections library where you can adjust any material's properties with no effect to other truss project. The options to create your own material library will be available for the next update. • PDF Reporting: All result information of your truss are shown in PDF and also you can email this result.
Deflection
Calculate structural behavior for beams, 2D trusses, and 2D frames. Visualize reaction forces, shear, bending moment, and deflection. Analyze internal stresses along the beam and cross-section.
- 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
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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.
Screenshots
Verdict
The clearest difference is review sentiment: Deflection at 74% against A's 26%. Deflection also leads on rating (4.6 vs 2.3) and ratings volume (115 vs 3). A's advantage is chart position (#192 vs unranked). On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
A costs $4.99 and Deflection $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Deflection holds the better App Store score, 4.6 against 2.3. That said, the two scores are not equally well evidenced: Deflection has 115 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 26% of A's written reviews are positive against 74% of Deflection's.
A ships an update every 5 weeks, Deflection every 6 weeks. The most recent releases landed on October 26, 2026 and November 1, 2026 respectively.
| Parameter | A | Deflection |
|---|---|---|
| Price | $4.99 | $4.99 |
| Rating | 2.3 (3 ratings) | 4.6 (115 ratings) — better |
| Positive reviews | 26.5% of reviews | 73.6% of reviews — better |
| Number of ratings | 3 | 115 — better |
| Update frequency | Every 5 weeks — better | Every 6 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | #192 — better | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 10 MB | 160 MB |
| Age rating | 4+ | 4+ |
| Developer | Jutarus Ratanasethakul | Blue Ketchep |
Customer experience
A
Deflection
In-app purchases
A
No in-app purchases
Deflection
No in-app purchases









