TopOpt 3D vs STRUCT
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TopOpt 3D
Perform 3D structural optimization using topology optimization on your iPad or iPhone. Adjust loads, supports, volume fractions, and grid sizes to observe design evolution. Experiment with different parameters to discover new minimums.
- 3D topology optimization
- Adjustable loads and supports
- Variable volume fractions
- Experiment with grid sizes
- Design evolution visualization
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Use your iPad/iPhone to perform structural optimization by the topology optimization method in 3D ! Move loads and supports and watch the design evolve to a new minimum. Experiment with different volume fractions and grid sizes and see what happens.
STRUCT
Explore structural engineering concepts in augmented reality. Visualize how beams and bridges react to loads in your own space, offering an interactive and engaging learning experience for students. No complex setup required, just your device and camera.
- Augmented reality visualization
- Interactive load simulations
- Pre-loaded finite element models
- Classroom and independent learning tool
- 3D model interaction
- Camera access for AR
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Have you ever wanted to see how a beam or bridge you encounter in everyday life reacts when load is applied? What if you could see these in your space at all angles, without having to specify material types, meshing or boundary conditions? STRUCT-AR utilizes finite element models pre-loaded into this mobile AR application that allows users to interact and engage with the models on their mobile device or tablet. This can be used as a complementary teaching tool for enhancing personalized learning wherein students can leverage the technology as a learning companion both within the classroom and outside to better understand structural behaviors and mechanisms that are challenging to convey in a traditional 2D learning environment. To use the app, you must allow it to access your camera. No identifiable data is stored on any server and you can revoke access at any time.
Screenshots
Verdict
The clearest difference is rating: STRUCT at 5.0 against TopOpt 3D's 3.7. TopOpt 3D's advantage is ratings volume (3 vs 1) and iOS requirement (11.0 vs 15.0). 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
STRUCT holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 3 and 1 respectively.
TopOpt 3D ships an update every 6 weeks, STRUCT every 4 weeks. The most recent releases landed on October 4, 2026 and September 30, 2026 respectively.
| Parameter | TopOpt 3D | STRUCT |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (3 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 3 — better | 1 |
| Update frequency | Every 6 weeks | Every 4 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 103 MB | 165 MB |
| Age rating | 4+ | 4+ |
| Developer | DTU Mechanical Engineering | UVA Apps, LLC |
Customer experience
TopOpt 3D
STRUCT
In-app purchases
TopOpt 3D
No in-app purchases
STRUCT
No in-app purchases
Questions
Is TopOpt 3D free?
Is STRUCT free?
Which has better reviews, TopOpt 3D or STRUCT?
Do TopOpt 3D or STRUCT have ads?
Which is updated more often, TopOpt 3D or STRUCT?
Other comparisons
