Millennium Problems vs Cryptography Concepts
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Millennium Problems
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.
- 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
Read full descriptionHide full description
Can you solve a problem worth $1,000,000? The Clay Mathematics Institute has offered a million-dollar prize for each of seven unsolved mathematical problems — and nobody has claimed them yet. Millennium Problems brings these mysteries to life for everyone, from curious 11-year-olds to doctoral researchers. SEVEN LEGENDARY PROBLEMS • P vs NP — Is finding as hard as checking? • Riemann Hypothesis — Where do prime numbers hide? • Yang-Mills & Mass Gap — Why do particles have mass? • Navier-Stokes — Can we predict turbulent fluids? • Hodge Conjecture — What shapes are built from algebra? • Birch & Swinnerton-Dyer — How many solutions does an equation have? • Poincaré Conjecture — The shape of the universe (SOLVED!) EVERY SKILL LEVEL Choose your grade — from Grade 6 to Graduate — and the content adapts instantly. The same problem is explained with simple analogies for a middle schooler and rigorous proofs for a PhD student. INTERACTIVE 3D VISUALISATIONS Every problem comes with a real-time Three.js visualisation. Watch elliptic curves rotate, Riemann zeros appear on the critical line, and fluid particle fields swirl — all rendered natively on your device. BUILT-IN QUIZZES Test your understanding with 5 questions per problem per grade level. Earn XP, track your streak, and collect badges as you explore. WORKS OFFLINE No account. No subscription. No ads. Everything runs locally on your device. OPTIONAL BIOMETRIC LOCK Protect your progress with Face ID, Touch ID, or fingerprint — entirely optional. Whether you're a student looking for a challenge, a teacher seeking engaging material, or a mathematician revisiting the classics, Millennium Problems meets you where you are. Clay Mathematics Institute · $7,000,000 in unclaimed prizes · Since 2000
Cryptography Concepts
Read full descriptionHide full description
Cryptography Concepts is an independent study app for learners who want to build practical understanding of crypto fundamentals, real-world usage, common mistakes, and advanced ideas. Use it for self-paced review, interview prep, classroom reinforcement, or security upskilling. - 160 practice questions across Fundamentals, Practical Skills, Common Pitfalls, and Advanced Concepts - Every question includes an explanation - FSRS spaced-repetition intervals to help schedule review - Weak-point heatmap to show topics that need attention - Daily challenge for consistent practice - Mock exams for timed review - Offline practice with no account setup Practice offline, no login required. Independent study app for Cryptography Concepts practice. Not affiliated with, endorsed by, or sponsored by any company, certification body, exam operator, or vendor. All trademarks belong to their respective owners.
Screenshots
Verdict
Millennium Problems and Cryptography Concepts are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Millennium Problems | Cryptography Concepts |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 4 days | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 9 MB | 38 MB |
| Age rating | 4+ | 4+ |
| Developer | Loic Fonkam | AFTW LLC |
In-app purchases
Millennium Problems
No in-app purchases
Cryptography Concepts
No in-app purchases
Questions
Is Millennium Problems free?
Is Cryptography Concepts free?
Do Millennium Problems or Cryptography Concepts have ads?
Other comparisons















