# Structural Engineering lite vs 3D Topology Optimizer

The clearest difference is update cadence: 3D Topology Optimizer at every 6 days against Structural Engineering lite's every 6 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Structural Engineering lite sells 1 one-off in-app purchase and 3D Topology Optimizer sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Structural Engineering lite ships an update every 6 months, 3D Topology Optimizer every 6 days. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Structural Engineering lite | 3D Topology Optimizer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (19 ratings)](https://appshunter.io/ios/app/structural-engineering-lite/id638690043/reviews)** | — |
| Number of ratings | **19** | — |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 6 months | **Every 6 days** |
| Monetization | Free with in-app purchases | — |
| Size | 6 MB | 17 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) | [Maximilian Benchieb](https://appshunter.io/developer/1805481309) |

## What reviewers say

### Structural Engineering lite

[App page](https://appshunter.io/ios/app/structural-engineering-lite/id638690043)

This app provides engineers with essential structural formulas and calculations for civil construction projects. It offers instant results, demand/capacity checks, and a built-in database of materials and sections, all accessible on mobile devices.

**Highlights:** 59 structural formulas (AISC/ACI), Instant demand/capacity checks, Built-in AISC section database, Material and code references, USCS & SI unit support, Pass/Fail visual indicator

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Structural Engineering Calc. | $5.99 | one-time |


### 3D Topology Optimizer

[App page](https://appshunter.io/ios/app/3d-topology-optimizer/id6809777918)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Topology Export | $0.99 | one-time |


## Frequently asked questions

### Is Structural Engineering lite free?

Structural Engineering lite is free to download, with in-app purchases available.

### Is 3D Topology Optimizer free?

3D Topology Optimizer is free to download, with in-app purchases available.

### Do Structural Engineering lite or 3D Topology Optimizer have ads?

Both Structural Engineering lite and 3D Topology Optimizer show ads.

### Which is updated more often, Structural Engineering lite or 3D Topology Optimizer?

Structural Engineering lite ships an update every 6 months, and 3D Topology Optimizer every 6 days. Most recently, Structural Engineering lite was updated on November 4, 2026 and 3D Topology Optimizer on October 31, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*