# SigiCalc vs Modular Arithmetic

SigiCalc and Modular Arithmetic both sit at 5.0 stars, but that hides the real split: 100% of Modular Arithmetic's written reviews are positive against 50% of SigiCalc's. Modular Arithmetic also leads on update cadence (every 12 months vs every 48 months) and ratings volume (4 vs 1). SigiCalc's advantage is price (Free vs $1.99). On rating, ads and in-app purchases there is nothing between them.

SigiCalc 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 SigiCalc against 5.0 for Modular Arithmetic. Both are backed by a comparable volume of ratings — 1 and 4 respectively. Written reviews are what separate them: 50% of SigiCalc's written reviews are positive against 100% of Modular Arithmetic's.

SigiCalc ships an update every 48 months, Modular Arithmetic every 12 months. The most recent releases landed on September 3, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | SigiCalc | Modular Arithmetic |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/sigicalc/id522503444/reviews) | [5.0 (4 ratings)](https://appshunter.io/ios/app/modular-arithmetic/id687735575/reviews) |
| Number of ratings | 1 | **4** |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 48 months | **Every 12 months** |
| Monetization | **Free** | Paid |
| Size | 3 MB | 2 MB |
| Requires iOS | 17.0 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Siegware](https://appshunter.io/developer/443908611) | [Benjamin Burton](https://appshunter.io/developer/687735578) |

## What reviewers say

### SigiCalc

[App page](https://appshunter.io/ios/app/sigicalc/id522503444)

This app provides a graphical RPN calculator with an undo feature. Users can input mathematical equations and instantly visualize them with a plot. It's designed for simplicity and practicality in mathematical calculations.

**Highlights:** Graphical RPN calculator, Equation plotting, Undo functionality, Simple interface, Practical calculations

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is SigiCalc free?

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

### Is Modular Arithmetic free?

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

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

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

### Do SigiCalc or Modular Arithmetic have ads?

Neither SigiCalc nor Modular Arithmetic shows ads.

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

SigiCalc ships an update every 48 months, and Modular Arithmetic every 12 months. Most recently, SigiCalc was updated on September 3, 2026 and Modular Arithmetic on September 27, 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.*