# Modular Arithmetic vs calcMod

The clearest difference is price: calcMod at Free against Modular Arithmetic's $1.99. Modular Arithmetic's advantage is ratings volume (4 vs 1) and device support (4 vs 2). On rating, review sentiment, update cadence and ads there is nothing between them.

calcMod is free to download; Modular Arithmetic costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Modular Arithmetic against 5.0 for calcMod. Both are backed by a comparable volume of ratings — 4 and 1 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Modular Arithmetic ships an update every 12 months, calcMod every 18 months. The most recent releases landed on September 27, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Modular Arithmetic | calcMod |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [5.0 (4 ratings)](https://appshunter.io/ios/app/modular-arithmetic/id687735575/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/calcmod-light/id1445360983/reviews) |
| Number of ratings | **4** | 1 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 12 months** | Every 18 months |
| Monetization | Paid | **Free** |
| Size | 2 MB | 1 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Benjamin Burton](https://appshunter.io/developer/687735578) | [Alain Cardinaux](https://appshunter.io/developer/1443066124) |

## 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


### calcMod

[App page](https://appshunter.io/ios/app/calcmod-light/id1445360983)

This application helps users perform complex mathematical calculations, including factorials, primality tests, and modular arithmetic. It's designed for students and educators interested in number theory and the properties of integers.

**Highlights:** Factorial calculation up to 80!, Primality testing with change mod function, Divisor identification, Modular exponentiation, Modular inverse calculation, Number storage and recall

**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 calcMod free?

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

### Which has better reviews, Modular Arithmetic or calcMod?

Modular Arithmetic and calcMod are both rated 5.0 out of 5 on the App Store, from 4 and 1 ratings respectively.

### Do Modular Arithmetic or calcMod have ads?

Neither Modular Arithmetic nor calcMod shows ads.

### Which is updated more often, Modular Arithmetic or calcMod?

Modular Arithmetic ships an update every 12 months, and calcMod every 18 months. Most recently, Modular Arithmetic was updated on September 27, 2026 and calcMod on October 2, 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.*