# Modular Arithmetic vs Polyhedron and Polyhedra Vol.2

The clearest difference is rating: Modular Arithmetic at 5.0 against Polyhedron and Polyhedra Vol.2's 4.3. Modular Arithmetic also leads on update cadence (every 12 months vs every 28 months) and device support (4 vs 1). On review sentiment, ratings volume, ads and in-app purchases there is nothing between them.

Modular Arithmetic costs $1.99 and Polyhedron and Polyhedra Vol.2 $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Modular Arithmetic holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 4 and 3 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Modular Arithmetic ships an update every 12 months, Polyhedron and Polyhedra Vol.2 every 28 months. The most recent releases landed on October 14, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Modular Arithmetic | Polyhedron and Polyhedra Vol.2 |
| --- | --- | --- |
| Price | **$1.99** | $2.99 |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/modular-arithmetic/id687735575/reviews)** | [4.3 (3 ratings)](https://appshunter.io/ios/app/polyhedron-and-polyhedra-vol2/id1073494585/reviews) |
| Number of ratings | **4** | 3 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 12 months** | Every 28 months |
| Monetization | Paid | Paid |
| Size | 2 MB | 5 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Benjamin Burton](https://appshunter.io/developer/687735578) | [Masahiko Fukuyama](https://appshunter.io/developer/595177290) |

## What reviewers say

### Modular Arithmetic

[App page](https://appshunter.io/ios/app/modular-arithmetic/id687735575)

Perform calculations with remainders using a chosen modulus. Supports large numbers, fast modular division and exponentiation, and displays a full calculation transcript. Ideal for understanding modular arithmetic's applications in math and computer science.

**Highlights:** Fixed modulus selection, Arbitrarily large numbers, Fast modular division and exponentiation, Full calculation transcript, Order of operations convention, External keyboard and Siri Shortcuts support

**Features:** Vision Pro support

**In-app purchases:** none


### Polyhedron and Polyhedra Vol.2

[App page](https://appshunter.io/ios/app/polyhedron-and-polyhedra-vol2/id1073494585)

Explore and learn about complex 3D mathematical solids, including star polyhedra and their compounds. Interact with these abstract shapes through intuitive touch gestures, customize their appearance with various colors and patterns, and view them from any angle.

**Highlights:** Interactive 3D model rotation, zoom, and pan, Toggle visibility of faces and components, Adjustable edge thickness and color, Extensive library of polyhedral compounds, Customizable face color patterns, Access to Wikipedia for related information, Save PNG images of models

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Modular Arithmetic free?

Modular Arithmetic costs $1.99, with no in-app purchases.

### Is Polyhedron and Polyhedra Vol.2 free?

Polyhedron and Polyhedra Vol.2 costs $2.99, with no in-app purchases.

### Which has better reviews, Modular Arithmetic or Polyhedron and Polyhedra Vol.2?

Modular Arithmetic is rated higher. Modular Arithmetic averages 5.0 out of 5 from 4 ratings, while Polyhedron and Polyhedra Vol.2 averages 4.3 from 3 ratings.

### Do Modular Arithmetic or Polyhedron and Polyhedra Vol.2 have ads?

Neither Modular Arithmetic nor Polyhedron and Polyhedra Vol.2 shows ads.

### Which is updated more often, Modular Arithmetic or Polyhedron and Polyhedra Vol.2?

Modular Arithmetic ships an update every 12 months, and Polyhedron and Polyhedra Vol.2 every 28 months. Most recently, Modular Arithmetic was updated on October 14, 2026 and Polyhedron and Polyhedra Vol.2 on October 11, 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.*