# Mechanical Engineer vs Design Materials

The clearest difference is ratings volume: Mechanical Engineer at 8 against Design Materials's 2. On price, rating, review sentiment and update cadence there is nothing between them.

Both are free to download. Mechanical Engineer sells 3 in-app purchases, starting at $0.99 per month and Design Materials sells 3 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.4 for Mechanical Engineer against 4.5 for Design Materials. Both are backed by a comparable volume of ratings — 8 and 2 respectively. Written reviews are what separate them: 31% of Mechanical Engineer's written reviews are positive against 33% of Design Materials's.

Mechanical Engineer ships an update every 2 months, Design Materials every 3 months. The most recent releases landed on August 13, 2026 and July 23, 2026 respectively.

## The numbers

| Metric | Mechanical Engineer | Design Materials |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (8 ratings)](https://appshunter.io/ios/app/mechanical-engineer/id327055140/reviews) | **[4.5 (2 ratings)](https://appshunter.io/ios/app/design-materials/id975764691/reviews)** |
| Number of ratings | **8** | 2 |
| Positive reviews | 30.8% of reviews | **33.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 5 MB | 28 MB |
| Requires iOS | **17.6** | 18.6 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Historycentral.com](https://appshunter.io/developer/1744330560) | [Chrystian Enriquez](https://appshunter.io/developer/428286625) |

## What reviewers say

### Mechanical Engineer

[App page](https://appshunter.io/ios/app/mechanical-engineer/id327055140)

This app provides over 300 essential mechanical engineering formulas across various domains. It allows users to calculate, save, compare, and share results, aiding in project optimization and decision-making. Users can access a limited number of calculations for free, with a subscription unlocking full functionality.

**Highlights:** Over 300 mechanical engineering formulas, Covers diverse engineering domains, Save and compare formula results, Share calculation outcomes, Intuitive and practical interface, Regular updates based on user input

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $0.99 | per month |
| Pro Quarterly | $0.99 | per 3 months |
| Pro Yearly | $2.99 | per year |


### Design Materials

[App page](https://appshunter.io/ios/app/design-materials/id975764691)

This app serves as an offline reference guide for various design materials, including polymers and metals. It allows users to manage their own material data, view 3D models, and capture objects with their device's camera. Ideal for professionals and hobbyists involved in product design and 3D printing.

**Highlights:** Offline material reference guide, Custom material and resin management, 3D model viewer and import/export, Object capture via device camera, Favorites and notes section, Cross-device compatibility (iOS, macOS)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Bronze member | $7.99 | per month |
| Silver member | $17.99 | per 3 months |
| Gold member | $49.99 | per year |


## Frequently asked questions

### Is Mechanical Engineer free?

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

### Is Design Materials free?

Design Materials is free to download, with in-app purchases available.

### Which has better reviews, Mechanical Engineer or Design Materials?

Design Materials is rated higher. Mechanical Engineer averages 4.4 out of 5 from 8 ratings, while Design Materials averages 4.5 from 2 ratings.

### Do Mechanical Engineer or Design Materials have ads?

Neither Mechanical Engineer nor Design Materials shows ads.

### Which is updated more often, Mechanical Engineer or Design Materials?

Mechanical Engineer ships an update every 2 months, and Design Materials every 3 months. Most recently, Mechanical Engineer was updated on August 13, 2026 and Design Materials on July 23, 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.*