# CSiSteel vs mechanical design engine

The clearest difference is update cadence: CSiSteel at every 3 weeks against mechanical design engine's every 2 months. CSiSteel also leads on iOS requirement (9.0 vs 13.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

CSiSteel ships an update every 3 weeks, mechanical design engine every 2 months. The most recent releases landed on September 29, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | CSiSteel | mechanical design engine |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (7 ratings)](https://appshunter.io/ios/app/csisteel/id1435293643/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free | — |
| Size | 19 MB | 63 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Computers and Structures, Inc.](https://appshunter.io/developer/1119970032) | [gan dae choi](https://appshunter.io/developer/1574341439) |

## What reviewers say

### CSiSteel

[App page](https://appshunter.io/ios/app/csisteel/id1435293643)

This app provides a comprehensive library of steel sections and their structural properties. It helps users find optimum sections for design, search for equivalents, and sort by various parameters. Ideal for engineers, suppliers, teachers, and students involved in steel design projects.

**Highlights:** Comprehensive steel section library, Find equivalent steel sections, Search and sort by section properties, Supports ASD and LRFD methods, Includes AISC, CISC, and Arcelormittal sections

**In-app purchases:** none


### mechanical design engine

[App page](https://appshunter.io/ios/app/mechanical-design-engine/id1574341437)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CSiSteel free?

CSiSteel is free to download, with no in-app purchases.

### Is mechanical design engine free?

mechanical design engine is free to download, with no in-app purchases.

### Do CSiSteel or mechanical design engine have ads?

Neither CSiSteel nor mechanical design engine shows ads.

### Which is updated more often, CSiSteel or mechanical design engine?

CSiSteel ships an update every 3 weeks, and mechanical design engine every 2 months. Most recently, CSiSteel was updated on September 29, 2026 and mechanical design engine on October 11, 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.*