# Mechanical Engineering Toolkit vs Polygon

The clearest difference is rating: Mechanical Engineering Toolkit at 4.8 against Polygon's 3.0. Mechanical Engineering Toolkit also leads on ratings volume (64 vs 1) and monetization model (ad-supported vs freemium). Polygon's advantage is ads (none vs shown). On price, update cadence and in-app purchases there is nothing between them.

Both are free to download. Mechanical Engineering Toolkit sells 1 one-off in-app purchase and Polygon sells 4 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Mechanical Engineering Toolkit holds the better App Store score, 4.8 against 3.0. That said, the two scores are not equally well evidenced: Mechanical Engineering Toolkit has 64 ratings behind it against 1, so its average is the more settled of the two.

Mechanical Engineering Toolkit ships an update every 8 days, Polygon weekly. The most recent releases landed on September 24, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Mechanical Engineering Toolkit | Polygon |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (64 ratings)](https://appshunter.io/ios/app/mechanical-engineering-toolkit/id1601099443/reviews)** | [3.0 (1 ratings)](https://appshunter.io/ios/app/polygon-inertia-centroid/id6469235285/reviews) |
| Number of ratings | **64** | 1 |
| Positive reviews | 57.1% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 8 days | **Weekly** |
| Monetization | **Ad-supported** | Freemium |
| Size | 38 MB | 29 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [APPS BAY LIMITED](https://appshunter.io/developer/1599035519) | [Adrian Caballero](https://appshunter.io/developer/1635287590) |

## What reviewers say

### Mechanical Engineering Toolkit

[App page](https://appshunter.io/ios/app/mechanical-engineering-toolkit/id1601099443)

This utility app provides a comprehensive collection of engineering equations and formulas for students and professionals. Easily perform calculations by selecting a formula and inputting variables, with detailed instructions and reference material included.

**Highlights:** Engineering equations and formulas, Mechanics of Material calculations, Theory of Elasticity formulas, Composite Material properties, Reference material, Variable input for calculations

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


### Polygon

[App page](https://appshunter.io/ios/app/polygon-inertia-centroid/id6469235285)

Calculate complex properties of any polygonal figure, including centroids, moments of inertia, and perimeter. Simply input vertex coordinates for instant results, saving significant time on tedious calculations.

**Highlights:** Polygon Centroids, Moments of Inertia (Ix, Iy, Ixy), Polar Moment of Inertia, Radius of Gyration, Principal Moments of Inertia, Area and Perimeter, Side Lengths, Hollow Sections

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Access | $2.99 | per month |
| Pro Access | $4.99 | per 6 months |
| Pro Access | $6.99 | per year |
| Pro Access | $9.99 | one-time |


## Frequently asked questions

### Is Mechanical Engineering Toolkit free?

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

### Is Polygon free?

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

### Which has better reviews, Mechanical Engineering Toolkit or Polygon?

Mechanical Engineering Toolkit is rated higher. Mechanical Engineering Toolkit averages 4.8 out of 5 from 64 ratings, while Polygon averages 3.0 from 1 ratings.

### Do Mechanical Engineering Toolkit or Polygon have ads?

Mechanical Engineering Toolkit shows ads; Polygon does not.

### Which is updated more often, Mechanical Engineering Toolkit or Polygon?

Mechanical Engineering Toolkit ships an update every 8 days, and Polygon weekly. Most recently, Mechanical Engineering Toolkit was updated on September 24, 2026 and Polygon on September 20, 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.*