# Polygon: Inertia, Centroid — Easy and Fast calculations

> Calculate polygon properties like centroids, moments of inertia, and area. (iPhone/iPad app by Adrian Caballero.)

- Source: https://appshunter.io/ios/app/polygon-inertia-centroid/id6469235285 (this page in markdown: same URL + `.md`)
- Developer: [Adrian Caballero](https://appshunter.io/developer/1635287590)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Rating: 3.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 17.0 · 29 MB
- Languages: American English, Danish, Dutch, French (France), German (Germany), Hindi, Indonesian, Italian, Japanese, Korean and 9 more
- Released: 2023-11-01
- Data updated: 2026-08-26
- Monetization: freemium
- User reviews in markdown: https://appshunter.io/ios/app/polygon-inertia-centroid/id6469235285/reviews.md

## What is Polygon?

Polygon will allow you to calculate complex and tedious calculations related to any polygonal figure, whether concave or convex, regular or irregular, in a simple and instantaneous way:

- Polygon Centroids
- Moments of Inertia Ix, Iy, Ixy
- Polar Moment of Inertia
- Radius of gyration
- Principal Moments of Inertia (Iu, Iv and their respective angles)
- Area and Perimeter of the polygon
- Length of each side of the polygon
- Even incorporate hollow sections
- Rotate the axes to a custom angle
- Define new custom axes at any point
- and much more

You just have to enter the coordinates of the vertices of your polygon and press the button and it will immediately calculate all the previous properties, saving valuable time.

Subscription Terms:
Payment will be charged to Itunes Account at confirmation of purchase. Subscription automatically renews unless auto-renew is turnerd off at least 24-hours before the end of the current period. Account will be charged for renewal within 24-hour prior to the end of the current period, and identify the cost of the renewal. Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Setting after purchase. No cancellation of the current subscription is allowed during active subscription period.

For in-app purchases and subscriptions, see Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Key features

- 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

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Pro Access | $6.99 | per year |
| Pro Access | $2.99 | per month |
| Pro Access | $4.99 | per 6 months |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Pro Access | $9.99 | one-time |



## Frequently asked questions about Polygon

### What calculations does Polygon offer?

Polygon calculates polygon centroids, moments of inertia (Ix, Iy, Ixy), polar moment of inertia, radius of gyration, principal moments of inertia, area, perimeter, and side lengths. It can also incorporate hollow sections and allows for custom axis rotation and definition.

### How do I use Polygon?

You simply enter the coordinates of the vertices of your polygon into the app and press the calculation button. The app will then instantly provide all the calculated properties.

### What devices is Polygon available on?

Polygon is available on iPhone and iPad devices.

### What is the age rating for Polygon?

Polygon has an age rating of 4+, making it suitable for a wide range of users.

### How much does Polygon cost?

Polygon is free to download and use. It offers optional in-app purchases for Pro Access subscriptions.

### What are the subscription options for Polygon?

Polygon offers Pro Access subscriptions at $2.99 per month, $4.99 for six months, and $6.99 annually. These subscriptions automatically renew unless turned off at least 24 hours before the current period ends.

### Can I cancel my Polygon subscription?

Yes, you can manage your subscriptions and turn off auto-renewal by going to your Account Settings after purchase. However, no cancellation of the current subscription is allowed during the active subscription period.

### Does Polygon have ads?

No, Polygon does not contain advertisements. The app is ad-free.

## Version history (last 5 releases)

### 3.9.4 — 2026-08-25

Performance improvements and support for the following languages has been added: Turkish, Vietnamese, Thai, Swedish, Indonesian, Dutch, Danish, and Norwegian.

### 3.9.3 — 2025-10-01

Bug fixes and performance improvements.

### 3.9.2 — 2025-07-16

Minor improvements and bug fixes.

### 3.9.1 — 2025-02-27

In this new version, minor bugs have been fixed.

### 3.9 — 2025-02-24

This update includes design enhancements and performance optimizations for a smoother and more efficient experience.

## Apps similar to Polygon

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Beam Stress Calculator Beamer](https://appshunter.io/ios/app/beam-stress-calculator-beamer/id6473653573) | 4.0 (1) | Free | Utilities |
| [Beam Engineering lite](https://appshunter.io/ios/app/beam-engineering-lite/id1048358824) | 4.4 (32) | Free | Utilities |
| [Structural Engineering lite](https://appshunter.io/ios/app/structural-engineering-lite/id638690043) | 4.2 (19) | Free | Utilities |
| [Mechanical Engineering Toolkit](https://appshunter.io/ios/app/mechanical-engineering-toolkit/id1601099443) | 4.8 (64) | Free | Utilities |
| [Square Footage Calculator +](https://appshunter.io/ios/app/square-footage-calculator-plus/id1493893224) | 4.5 (292) | Free | Utilities |
| [Apoio Duplo](https://appshunter.io/ios/app/apoio-duplo/id1571189621) | 5.0 (3) | Free | Utilities |

## More apps by Adrian Caballero

- [MapGo: Countries of the world](https://appshunter.io/ios/app/mapgo-countries-of-the-world/id1635287588)
- [MathCalc: Fraction Calculator](https://appshunter.io/ios/app/mathcalc-fraction-calculator/id6760150461)

All apps by Adrian Caballero: https://appshunter.io/developer/1635287590

## Related topics

[inertia pro](https://appshunter.io/ios/topics/inertia-pro) · [polygon mathematics](https://appshunter.io/ios/topics/polygon-mathematics) · [polygon land](https://appshunter.io/ios/topics/polygon-land) · [polygon effect](https://appshunter.io/ios/topics/polygon-effect) · [InterIQ](https://appshunter.io/ios/topics/interiq) · [inertia](https://appshunter.io/ios/topics/inertia) · [hyperbolic software](https://appshunter.io/ios/topics/hyperbolic-software)

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-26.*