# Surface Area Calculator + Cost vs Polygon

The clearest difference is rating: Surface Area Calculator + Cost at 3.5 against Polygon's 3.0. Surface Area Calculator + Cost also leads on ratings volume (24 vs 1) and iOS requirement (15.0 vs 17.0). Polygon's advantage is update cadence (weekly vs every 6 months). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Surface Area Calculator + Cost sells 3 in-app purchases, starting at $1.99 per month 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.

Surface Area Calculator + Cost holds the better App Store score, 3.5 against 3.0. That said, the two scores are not equally well evidenced: Surface Area Calculator + Cost has 24 ratings behind it against 1, so its average is the more settled of the two.

Surface Area Calculator + Cost ships an update every 6 months, Polygon weekly. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Surface Area Calculator + Cost | Polygon |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (24 ratings)](https://appshunter.io/ios/app/surface-area-calculator-plus-cost/id1502218219/reviews)** | [3.0 (1 ratings)](https://appshunter.io/ios/app/polygon-inertia-centroid/id6469235285/reviews) |
| Number of ratings | **24** | 1 |
| Positive reviews | 22.2% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Weekly** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 4 MB | 29 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Phan Nhat Đang](https://appshunter.io/developer/1437390098) | [Adrian Caballero](https://appshunter.io/developer/1635287590) |

## What reviewers say

### Surface Area Calculator + Cost

[App page](https://appshunter.io/ios/app/surface-area-calculator-plus-cost/id1502218219)

Calculate the surface area of various 3D geometric shapes and get an estimated cost for materials. Supports multiple units for calculations and results.

**Highlights:** Surface area calculation for 11 shapes, Material cost estimation, Multiple unit support, Results in various units, Subscription for unlimited access

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium monthly package | $1.99 | per month |
| Annual Premium Package | $14.99 | per year |
| Remove ads | $19.99 | 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 Surface Area Calculator + Cost free?

Surface Area Calculator + Cost 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, Surface Area Calculator + Cost or Polygon?

Surface Area Calculator + Cost is rated higher. Surface Area Calculator + Cost averages 3.5 out of 5 from 24 ratings, while Polygon averages 3.0 from 1 ratings.

### Do Surface Area Calculator + Cost or Polygon have ads?

Neither Surface Area Calculator + Cost nor Polygon shows ads.

### Which is updated more often, Surface Area Calculator + Cost or Polygon?

Surface Area Calculator + Cost ships an update every 6 months, and Polygon weekly. Most recently, Surface Area Calculator + Cost was updated on November 3, 2026 and Polygon on October 30, 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.*