# Smart vs Polygon

The clearest difference is in-app purchases: Smart at none against Polygon's 4. Smart also leads on iOS requirement (9.0 vs 17.0). Polygon's advantage is update cadence (weekly vs every 3 weeks). On price, 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. Smart asks for nothing beyond the download.

Smart ships an update every 3 weeks, Polygon weekly. The most recent releases landed on September 14, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Smart | Polygon |
| --- | --- | --- |
| 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 | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | — | Freemium |
| Size | 51 MB | 29 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Palette](https://appshunter.io/developer/1035555402) | [Adrian Caballero](https://appshunter.io/developer/1635287590) |

## What reviewers say

### Smart

[App page](https://appshunter.io/ios/app/smart-m/id1521788700)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 Smart free?

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

### Is Polygon free?

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

### Do Smart or Polygon have ads?

Neither Smart nor Polygon shows ads.

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

Smart ships an update every 3 weeks, and Polygon weekly. Most recently, Smart was updated on September 14, 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.*