# Mass vs mechanical design engine

The clearest difference is update cadence: Mass at every 3 weeks against mechanical design engine's every 2 months. Mass also leads on iOS requirement (8.0 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.

Mass ships an update every 3 weeks, mechanical design engine every 2 months. The most recent releases landed on October 9, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Mass | mechanical design engine |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/mass-finder/id802275884/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free | — |
| Size | 7 MB | 63 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Solaz Dazen srl](https://appshunter.io/developer/802275887) | [gan dae choi](https://appshunter.io/developer/1574341439) |

## What reviewers say

### Mass

[App page](https://appshunter.io/ios/app/mass-finder/id802275884)

This utility app calculates the mass of metal and plastic preforms directly on the field. It supports various preform and material types, offering metric and imperial measurement modes for convenience.

**Highlights:** 13 preform types, 9 material types with alloys, Graphical preform representation, Metric and imperial modes, Help section, Easy to use

**Features:** macOS Compatibility

**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 Mass free?

Mass 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 Mass or mechanical design engine have ads?

Neither Mass nor mechanical design engine shows ads.

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

Mass ships an update every 3 weeks, and mechanical design engine every 2 months. Most recently, Mass was updated on October 9, 2026 and mechanical design engine on October 11, 2026.

---

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