# TopOpt 3D vs Mechanical Components

The clearest difference is rating: TopOpt 3D at 3.7 against Mechanical Components's 3.0. TopOpt 3D also leads on in-app purchases (none vs 4) and update cadence (every 6 weeks vs every 7 months). On price, ratings volume and ads there is nothing between them.

Both are free to download. Mechanical Components sells 4 in-app purchases, starting at $7.99 per 7 days. TopOpt 3D asks for nothing beyond the download.

TopOpt 3D holds the better App Store score, 3.7 against 3.0. Both are backed by a comparable volume of ratings — 3 and 2 respectively.

TopOpt 3D ships an update every 6 weeks, Mechanical Components every 7 months. The most recent releases landed on October 4, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | TopOpt 3D | Mechanical Components |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/topopt-3d/id881472301/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/mechanical-components/id6738186476/reviews) |
| Number of ratings | **3** | 2 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 7 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 103 MB | 49 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [DTU Mechanical Engineering](https://appshunter.io/developer/507453160) | [Forwa Elade Wunde](https://appshunter.io/developer/1685241344) |

## What reviewers say

### TopOpt 3D

[App page](https://appshunter.io/ios/app/topopt-3d/id881472301)

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.

**Highlights:** 3D topology optimization, Adjustable loads and supports, Variable volume fractions, Experiment with grid sizes, Design evolution visualization

**Features:** macOS Compatibility

**In-app purchases:** none


### Mechanical Components

[App page](https://appshunter.io/ios/app/mechanical-components/id6738186476)

Test your knowledge of mechanical components with interactive quizzes. Features high-quality images, instant feedback, and multiple difficulty levels to help you master engineering parts. Ideal for students, DIY enthusiasts, and professionals.

**Highlights:** Interactive quizzes on mechanical parts, High-quality component images, Instant feedback and facts, Multiple difficulty levels, Learn and master engineering components

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Week | $7.99 | per 7 days |
| Month | $19.99 | per month |
| 6 months | $19.99 | per 6 months |
| Year | $29.99 | per year |


## Frequently asked questions

### Is TopOpt 3D free?

TopOpt 3D is free to download, with no in-app purchases.

### Is Mechanical Components free?

Mechanical Components is free to download, with in-app purchases available.

### Which has better reviews, TopOpt 3D or Mechanical Components?

TopOpt 3D is rated higher. TopOpt 3D averages 3.7 out of 5 from 3 ratings, while Mechanical Components averages 3.0 from 2 ratings.

### Do TopOpt 3D or Mechanical Components have ads?

Neither TopOpt 3D nor Mechanical Components shows ads.

### Which is updated more often, TopOpt 3D or Mechanical Components?

TopOpt 3D ships an update every 6 weeks, and Mechanical Components every 7 months. Most recently, TopOpt 3D was updated on October 4, 2026 and Mechanical Components on October 2, 2026.

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