# Modular Arithmetic vs Goldbach's Conjecture

The clearest difference is device support: Modular Arithmetic at 4 against Goldbach's Conjecture's 2. Goldbach's Conjecture's advantage is price ($0.99 vs $1.99). On update cadence, ads, in-app purchases and iOS requirement there is nothing between them.

Modular Arithmetic costs $1.99 and Goldbach's Conjecture $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Modular Arithmetic ships an update every 12 months, Goldbach's Conjecture every 8 months. The most recent releases landed on September 17, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Modular Arithmetic | Goldbach's Conjecture |
| --- | --- | --- |
| Price | $1.99 | **$0.99** |
| 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 8 months** |
| Monetization | Paid | — |
| Size | 2 MB | 34 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Benjamin Burton](https://appshunter.io/developer/687735578) | [Ventura Educational Systems](https://appshunter.io/developer/371324172) |

## 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


### Goldbach's Conjecture

[App page](https://appshunter.io/ios/app/goldbachs-conjecture/id1385243580)

**In-app purchases:** none


## Frequently asked questions

### Is Modular Arithmetic free?

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

### Is Goldbach's Conjecture free?

Goldbach's Conjecture costs $0.99, with no in-app purchases.

### Do Modular Arithmetic or Goldbach's Conjecture have ads?

Neither Modular Arithmetic nor Goldbach's Conjecture shows ads.

### Which is updated more often, Modular Arithmetic or Goldbach's Conjecture?

Modular Arithmetic ships an update every 12 months, and Goldbach's Conjecture every 8 months. Most recently, Modular Arithmetic was updated on September 17, 2026 and Goldbach's Conjecture on September 16, 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.*