# Modular Arithmetic vs iSmartESA

The clearest difference is update cadence: iSmartESA at every 3 months against Modular Arithmetic's every 12 months. Modular Arithmetic's advantage is price ($1.99 vs $3.99) and iOS requirement (12.0 vs 14.1). On ads, in-app purchases and device support there is nothing between them.

Modular Arithmetic costs $1.99 and iSmartESA $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Modular Arithmetic ships an update every 12 months, iSmartESA every 3 months. Both last shipped on September 27, 2026.

## The numbers

| Metric | Modular Arithmetic | iSmartESA |
| --- | --- | --- |
| Price | **$1.99** | $3.99 |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/modular-arithmetic/id687735575/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 3 months** |
| Monetization | Paid | — |
| Size | 2 MB | 3 MB |
| Requires iOS | **12.0** | 14.1 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Benjamin Burton](https://appshunter.io/developer/687735578) | [Hiroshi Nakano](https://appshunter.io/developer/1529446216) |

## 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


### iSmartESA

[App page](https://appshunter.io/ios/app/ismartesa/id1579688964)

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

**In-app purchases:** none


## Frequently asked questions

### Is Modular Arithmetic free?

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

### Is iSmartESA free?

iSmartESA costs $3.99, with no in-app purchases.

### Do Modular Arithmetic or iSmartESA have ads?

Neither Modular Arithmetic nor iSmartESA shows ads.

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

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