# Variance vs Millennium Problems

The clearest difference is in-app purchases: Millennium Problems at none against Variance's 3. Millennium Problems also leads on update cadence (every 4 days vs every 2 weeks) and iOS requirement (15.0 vs 26.0). Variance's advantage is ratings volume (5 vs 1). On price, rating, ads and device support there is nothing between them.

Both are free to download. Variance sells 3 in-app purchases, starting at $9.99 per month. Millennium Problems asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Variance against 5.0 for Millennium Problems. That said, the two scores are not equally well evidenced: Variance has 5 ratings behind it against 1, so its average is the more settled of the two.

Variance ships an update every 2 weeks, Millennium Problems every 4 days. The most recent releases landed on October 15, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Variance | Millennium Problems |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (5 ratings)](https://appshunter.io/ios/app/variance-the-quant-prep-app/id6760629839/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/millennium-problems/id6761263693/reviews) |
| Number of ratings | **5** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 4 days** |
| Monetization | Freemium | **Free** |
| Size | 18 MB | 9 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Benjamin Kawano](https://appshunter.io/developer/1885410913) | [Loic Fonkam](https://appshunter.io/developer/1884693208) |

## What reviewers say

### Variance

[App page](https://appshunter.io/ios/app/variance-the-quant-prep-app/id6760629839)

Prepare for quantitative finance interviews with this app. Practice probability, mental math, logic puzzles, and more with detailed solutions and progress tracking. Sharpen your mathematical intuition and problem-solving skills for trading and research roles.

**Highlights:** Probability practice, Mental math exercises, Logic puzzles, Detailed solutions, Progress tracking, Topic-specific practice

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Variance Pro Monthly | $9.99 | per month |
| Variance Pro 6-Month | $49.99 | per 6 months |
| Variance Pro Yearly | $99.99 | per year |


### 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 Variance free?

Variance is free to download, with in-app purchases available.

### Is Millennium Problems free?

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

### Which has better reviews, Variance or Millennium Problems?

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

### Do Variance or Millennium Problems have ads?

Neither Variance nor Millennium Problems shows ads.

### Which is updated more often, Variance or Millennium Problems?

Variance ships an update every 2 weeks, and Millennium Problems every 4 days. Most recently, Variance was updated on October 15, 2026 and Millennium Problems on October 9, 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.*