# Calc Visualizer vs Millennium Problems

The clearest difference is update cadence: Millennium Problems at every 4 days against Calc Visualizer's every 44 months. Millennium Problems also leads on device support (3 vs 1). Calc Visualizer's advantage is iOS requirement (8.0 vs 15.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Calc Visualizer ships an update every 44 months, Millennium Problems every 4 days. The most recent releases landed on September 27, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Calc Visualizer | Millennium Problems |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/millennium-problems/id6761263693/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 44 months | **Every 4 days** |
| Monetization | — | Free |
| Size | 39 MB | 9 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Bretl](https://appshunter.io/developer/553850818) | [Loic Fonkam](https://appshunter.io/developer/1884693208) |

## What reviewers say

### Calc Visualizer

[App page](https://appshunter.io/ios/app/calc-visualizer/id890468108)

**Features:** macOS Compatibility

**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 Calc Visualizer free?

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

### Is Millennium Problems free?

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

### Do Calc Visualizer or Millennium Problems have ads?

Neither Calc Visualizer nor Millennium Problems shows ads.

### Which is updated more often, Calc Visualizer or Millennium Problems?

Calc Visualizer ships an update every 44 months, and Millennium Problems every 4 days. Most recently, Calc Visualizer was updated on September 27, 2026 and Millennium Problems on October 9, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*