# Modular Arithmetic vs Millennium Problems

The clearest difference is price: Millennium Problems at Free against Modular Arithmetic's $1.99. Millennium Problems also leads on update cadence (every 4 days vs every 12 months). Modular Arithmetic's advantage is ratings volume (4 vs 1) and iOS requirement (12.0 vs 15.0). On rating, ads, in-app purchases and device support there is nothing between them.

Millennium Problems 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 Millennium Problems. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

Modular Arithmetic ships an update every 12 months, Millennium Problems every 4 days. The most recent releases landed on September 27, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Modular Arithmetic | Millennium Problems |
| --- | --- | --- |
| 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/millennium-problems/id6761263693/reviews) |
| Number of ratings | **4** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 4 days** |
| Monetization | Paid | **Free** |
| Size | 2 MB | 9 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Benjamin Burton](https://appshunter.io/developer/687735578) | [Loic Fonkam](https://appshunter.io/developer/1884693208) |

## 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


### Millennium Problems

[App page](https://appshunter.io/ios/app/millennium-problems/id6761263693)

Explore seven unsolved mathematical mysteries, each with a million-dollar prize. This app adapts content for all skill levels, from middle schoolers to doctoral researchers, with interactive 3D visualizations and built-in quizzes. Learn at your own pace, offline, with no ads or subscriptions.

**Highlights:** Explains seven major unsolved math problems, Content adapts to skill level (Grade 6 to Graduate), Interactive 3D visualizations, Built-in quizzes with XP and badges, Offline functionality, Optional biometric lock

**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 Millennium Problems free?

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

### Which has better reviews, Modular Arithmetic or Millennium Problems?

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

### Do Modular Arithmetic or Millennium Problems have ads?

Neither Modular Arithmetic nor Millennium Problems shows ads.

### Which is updated more often, Modular Arithmetic or Millennium Problems?

Modular Arithmetic ships an update every 12 months, and Millennium Problems every 4 days. Most recently, Modular Arithmetic was updated on September 27, 2026 and Millennium Problems on September 23, 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.*