# mechanical design engine vs Pipe Fitting & ASME Toolbox

The clearest difference is in-app purchases: mechanical design engine at none against Pipe Fitting & ASME Toolbox's 1. mechanical design engine also leads on update cadence (every 2 months vs every 4 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Pipe Fitting & ASME Toolbox sells 1 one-off in-app purchase. mechanical design engine asks for nothing beyond the download.

mechanical design engine ships an update every 2 months, Pipe Fitting & ASME Toolbox every 4 months. The most recent releases landed on October 11, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | mechanical design engine | Pipe Fitting & ASME Toolbox |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.9 (20 ratings)](https://appshunter.io/ios/app/pipe-fitting-and-asme-toolbox/id6752763143/reviews)** |
| Number of ratings | — | **20** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | — | Free with in-app purchases |
| Size | 63 MB | 210 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [gan dae choi](https://appshunter.io/developer/1574341439) | [Ashvin Kevadiya](https://appshunter.io/developer/1756324971) |

## What reviewers say

### mechanical design engine

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Pipe Fitting & ASME Toolbox

[App page](https://appshunter.io/ios/app/pipe-fitting-and-asme-toolbox/id6752763143)

Access essential piping engineering data, standards, and smart calculators for professionals and students. Covers ASME standards, pipe and flange dimensions, fitting details, and valve sizes. Includes daily tips and quizzes to enhance knowledge.

**Highlights:** Engineering calculators, Piping data and standards, Pipe dimensions, Flange dimensions, Fitting dimensions, Valve dimensions, Daily tips and quiz

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Premium | $9.99 | one-time |


## Frequently asked questions

### Is mechanical design engine free?

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

### Is Pipe Fitting & ASME Toolbox free?

Pipe Fitting & ASME Toolbox is free to download, with in-app purchases available.

### Do mechanical design engine or Pipe Fitting & ASME Toolbox have ads?

Neither mechanical design engine nor Pipe Fitting & ASME Toolbox shows ads.

### Which is updated more often, mechanical design engine or Pipe Fitting & ASME Toolbox?

mechanical design engine ships an update every 2 months, and Pipe Fitting & ASME Toolbox every 4 months. Most recently, mechanical design engine was updated on October 11, 2026 and Pipe Fitting & ASME Toolbox on October 24, 2026.

---

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