A vs Deflection Lite
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 Lite
This app provides interactive and precise structural beam analysis. Easily visualize beam bending by dragging loads and supports, and calculate key engineering results like reactions, shear force, and bending moment.
- Interactive beam bending visualization
- Calculate reactions, shear force, and bending moment
- Built-in cross-section databases
- Unlimited loads and supports
- Export design to shareable permalink
- Metric and standard units
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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. RESULTS Calculate reactions, shear force, bending moment, and beam deflection quickly and easily. CROSS SECTION DATABASES 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. UNLIMITED LOADS AND SUPPORTS 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 OTHER FEATURES • Export your design to a permalink that you can share. • Automatic detection of local maxima and minima in diagrams • Metric and standard measurement units 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 price: Deflection Lite at Free against A's $4.99. Deflection Lite also leads on rating (4.5 vs 2.3) and review sentiment (44% vs 15%). A's advantage is update cadence (every 6 weeks vs every 3 months) and chart position (#191 vs unranked). On ads, in-app purchases, monetization model and device support 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
Deflection Lite is free to download; A costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Deflection Lite holds the better App Store score, 4.5 against 2.3. That said, the two scores are not equally well evidenced: Deflection Lite has 46 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 15% of A's written reviews are positive against 44% of Deflection Lite's.
A ships an update every 6 weeks, Deflection Lite every 3 months. The most recent releases landed on September 10, 2026 and September 17, 2026 respectively.
| Parameter | A | Deflection Lite |
|---|---|---|
| Price | $4.99 | Free — better |
| Rating | 2.3 (3 ratings) | 4.5 (46 ratings) — better |
| Positive reviews | 15.0% of reviews | 44.4% of reviews — better |
| Number of ratings | 3 | 46 — better |
| Update frequency | Every 6 weeks — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | #191 — better | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 47 MB | 108 MB |
| Age rating | 4+ | 4+ |
| Developer | Jutarus Ratanasethakul | Blue Ketchep |
Customer experience
A
Deflection Lite
In-app purchases
A
No in-app purchases
Deflection Lite
No in-app purchases








