# Polygon vs AiSBMS

The clearest difference is in-app purchases: AiSBMS at none against Polygon's 4. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Polygon sells 4 in-app purchases, starting at $2.99 per month. AiSBMS asks for nothing beyond the download.

Polygon ships an update weekly, AiSBMS every 8 days. The most recent releases landed on September 20, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Polygon | AiSBMS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/polygon-inertia-centroid/id6469235285/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 8 days |
| Monetization | Freemium | — |
| Size | 29 MB | 21 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Adrian Caballero](https://appshunter.io/developer/1635287590) | [SOFTMILE corp.](https://appshunter.io/developer/1698063078) |

## What reviewers say

### 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 |


### AiSBMS

[App page](https://appshunter.io/ios/app/aisbms/id6473662261)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Polygon free?

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

### Is AiSBMS free?

AiSBMS is free to download, with no in-app purchases.

### Do Polygon or AiSBMS have ads?

Neither Polygon nor AiSBMS shows ads.

### Which is updated more often, Polygon or AiSBMS?

Polygon ships an update weekly, and AiSBMS every 8 days. Most recently, Polygon was updated on September 20, 2026 and AiSBMS on October 17, 2026.

---

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