A vs PatchPrinter
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
A
Analyze space trusses with this tool designed for structural engineers and students. It offers detailed solutions including node displacements, member forces, and stress, with an intuitive 3D interface and an assistant for complex truss creation.
- 3D graphics and UI
- Node displacements, member forces, and stress calculations
- Truss Assistant Creator for automatic generation
- Direct Stiffness Matrix solver
- Multiple viewing options (Proportion, Equal, Wireframe)
- PDF report generation
- Support for large space trusses
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A-Truss3D Pro is a structural analysis and visualization app for 3D truss systems. Create, edit, calculate, and review truss models directly on iPad with an interactive 3D canvas, engineering units, material properties, load cases, and direct stiffness method results. Design trusses by defining nodes, members, supports, materials, and loads. Visualize geometry, member labels, load arrows, reactions, deformations, dimensions, and force states with clear 3D controls. Review calculated displacements, reactions, member forces, stiffness matrices, equilibrium checks, and summary reports in one workflow. Key Features • Interactive 3D truss and double-layer space truss modeling • Node, member, material, load, and support editing • Direct stiffness method calculation • Member force results for tension, compression, and zero-force members • Node displacement and reaction results • Deformation visualization • Stiffness matrix and equilibrium report views • Custom unit templates and precision settings • Sample truss catalog for quick starting points • PDF report generation and preview • Canvas display controls for labels, dimensions, loads, reactions, font, and scale A-Truss3D Pro is built for engineering students, educators, and structural professionals who need a focused tool for creating and checking 3D truss behavior.
PatchPrinter
View your preproduction files on your iOS device without needing hard copies. Easily open and share PatchPrinter files from various sources like email or Airdrop. Navigate between files seamlessly in the organized list.
- View preproduction files
- Open from email attachments
- Open from WhatsApp
- Open via Airdrop
- Easy file switching
- Share files with colleagues
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Open your PatchPrinter (www.PatchPrinter.com) file and have a look at your preproduction without the need of using hardcopies. PatchPrinter for iOS shows all of the information which is available in the PatchPrinter file. You can open your PatchPrinter file from an email attachment, WhatsApp message, Airdrop, etc. Switching between files is easy in the Files list. Here you also can share your PatchPrinter file with your colleagues.
Screenshots
Verdict
The clearest difference is review sentiment: PatchPrinter at 100% against A's 0%. PatchPrinter also leads on price (Free vs $9.99) and iOS requirement (14.5 vs 18.6). A's advantage is update cadence (every 2 weeks vs every 3 months). On ads, in-app purchases 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
PatchPrinter is free to download; A costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
A ships an update every 2 weeks, PatchPrinter every 3 months. The most recent releases landed on September 9, 2026 and September 21, 2026 respectively.
| Parameter | A | PatchPrinter |
|---|---|---|
| Price | $9.99 | Free — better |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 2 weeks — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.6 | 14.5 — better |
| Further details — not scored | ||
| Size | 10 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Jutarus Ratanasethakul | Bart van Stiphout |
Customer experience
A
PatchPrinter
In-app purchases
A
No in-app purchases
PatchPrinter
No in-app purchases








