Comparison

Millennium Problems vs GradApp.

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

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
Read 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

About

GradApp.

Features
Read full description

GradApp is your graduate school advisor. Upload your CV, and GradApp reads the whole thing, not just keywords, then matches you with professors whose research interests genuinely overlap with your work. Every match shows the proof: a line from your CV next to a real paper of theirs, so you know exactly why it's a fit. WHY GRADAPP • Research interest matching: We match faculty by what they actually publish and are working on at their labs, then explain each match with evidence. No more guessing who to email. • Requirements, country by country: GPA, tests, and deadlines for every school, clearly laid out for the US, UK, Canada, Europe, and beyond. • Scholarships you can actually apply for: Funding matched to your profile, with eligibility and how to apply. • One-tap outreach: Draft a thoughtful email to a professor, grounded in their real papers — ready to personalize and send. • Track everything (application management): Every application, deadline, and task in one place, so nothing slips. • CV tools: Polish your CV and export a clean PDF. • Built-in advisor: Ask questions and get guidance at any step. NEW TO ALL THIS? You don't need a finished CV or a chosen country to begin. GradApp helps you figure out where to apply, what you need, and who to reach, at your pace. HOW IT WORKS 1. Upload your CV. 2. Pick where you want to apply. 3. Get your matched professors, ranked, with the evidence behind each one. 4. Save your shortlist, draft outreach, and track every deadline through to submission, and manage all your applications on GradApp. GradApp is for anyone applying to a master's or PhD who wants a clearer, faster, more honest path to the right program, wherever in the world they're headed.

Screenshots

Millennium Problems4 screens
GradApp.4 screens

Verdict

The call

Millennium Problems and GradApp. 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

CostPrice · In-app purchases · Ads · Monetization

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

ScorecardNo meaningful differences
Millennium Problems versus GradApp.: the parameters behind the verdict, then further details
ParameterMillennium ProblemsGradApp.
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 4 days—
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size9 MB35 MB
Age rating4+4+
DeveloperLoic FonkamDaniel Owusu

In-app purchases

None

Millennium Problems

No in-app purchases

None

GradApp.

No in-app purchases

Questions

Is Millennium Problems free?
Millennium Problems is free to download, with no in-app purchases.
Is GradApp. free?
GradApp. is free to download, with no in-app purchases.
Do Millennium Problems or GradApp. have ads?
Neither Millennium Problems nor GradApp. shows ads.

Other comparisons