Eurêkoi vs Physics Playground App
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Eurêkoi
Get personalized answers to your questions from 600 expert librarians within 72 hours. Receive tailored recommendations for books, films, series, and board games based on your preferences. All questions are answered anonymously, with sources and research methods provided.
- Personalized answers from librarians
- Recommendations for books, films, series
- Answers within 72 hours
- Sources and research methods provided
- Anonymous question submission
- Board game recommendations
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Culture, savoir, loisirs : obtenez des réponses personnalisées par des professionnels en 72 heures. Vous pouvez nous poser toutes les questions que vous voulez dans les limites de notre Charte (par exemple, nous ne proposons pas de diagnostics médicaux ou d'analyses juridiques). Nous vous proposons aussi des conseils personnalisés sur les films, les séries TV, les livres, les albums pour enfants ou les BD en moins de 72h. Qui répond ? Nous sommes 600 bibliothécaires experts en recherche documentaire. Dans quel délai ? Nous répondons en 72 heures maximum. Aucune demande n’est laissée sans réponse. Quels types de questions puis-je poser ? Vous pouvez nous poser des questions sur tous les sujets (mais nous ne faisons pas de consultations juridiques ou médicales). Vous pouvez aussi utiliser notre service de conseils personnalisés de livres, BD, albums pour enfants, films et jeux de société. Nous vous proposerons une courte liste d'œuvres en fonction des critères que vous aurez indiqués dans le formulaire. Aucune question ne sera laissée sans réponse. Nous fournissons nos sources et la méthode de recherche utilisée. Comment poser une question ? En remplissant le formulaire, vous recevrez ensuite la réponse dans votre messagerie. Mes questions sont-elles anonymes ? Vos questions sont posées de manière anonyme. Nous ne recueillons que votre adresse de courriel, pour permettre l’envoi de notre réponse. Qui est derrière ce service ? Eurêkoi est un service public proposé par la Bibliothèque publique d'information du Centre Pompidou à Paris pour le ministère de la Culture et le Service de la lecture publique de la Fédération Wallonie-Bruxelles. Le réseau Eurêkoi réunit 52 bibliothèques en France et en Belgique.
Physics Playground App
Explore the universe of physics and math through interactive simulations and real-time equation adjustments. Learn concepts from basic counting to advanced theories with hands-on playgrounds and mini-games that earn you badges. Designed for all levels of understanding, from children to PhDs.
- Interactive physics and math playgrounds
- Real-time equation adjustments
- Adjustable difficulty slider (Child to PhD)
- Mini-games with badge rewards
- Concept map for interconnected ideas
- Offline-first functionality
- No ads or accounts required
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Physics & Math, made playable. Touch a slider and watch the equation rewrite itself. Tilt a ramp and feel the friction. Aim a cannon, dial in a Lorentz factor, swing a double pendulum into chaos. Every idea has a hands-on playground that responds in real time. One app. The entire universe of physics and math - from counting blocks to category theory, from throwing a ball to the Theory of Everything. WHAT'S INSIDE • 55+ topics across Physics and Math, organized by tier - Classical, Modern, Frontier, plus Math Foundations, Intermediate, and Frontier. • A live difficulty slider that rewrites every explanation in real time for Child, Teen, Undergrad, or PhD. • Interactive playgrounds for every topic. Sliders, simulations, force diagrams, and SpriteKit physics that actually behave like physics. • Mini-games that earn you badges - predict chaos, balance crates, dial in gamma, win at quantum measurement, escape a black hole. • A concept map that shows how every idea connects to every other - drag, zoom, tap a node and dive in. • A constellation of earned badges that grows as you master the subjects. PHYSICS, FROM "WHAT IF" TO "WHY" Newton's Laws. Projectile motion. Energy & momentum. Orbits. Waves. Pendulum chaos. Thermodynamics. Fluids. Optics. Electromagnetism. Special Relativity. Spacetime. Photoelectric effect. Double-slit. Heisenberg uncertainty. Quantum tunneling. Stern-Gerlach spin. Atomic orbitals. The Standard Model. Statistical mechanics. Condensed matter. Lasers. Black holes. The Big Bang. String theory. Loop quantum gravity. Entanglement. Quantum computing. And the prize at the end - a Theory of Everything badge for mastering them all. MATH THAT BUILDS Counting → addition → subtraction → multiplication → division → fractions → decimals → percents and ratios → the number line. Then algebra, geometry, trigonometry, functions, exponents and logs, sequences, probability, and statistics. Then limits, derivatives, integrals, linear algebra, differential equations, complex analysis, topology, and category theory. HOW IT WORKS Pick a topic. Read a leveled explanation that matches your background. Scroll to the live equation strip and watch the variables update as you drag. Play with the simulator. Take on the challenge, earn the badge. Tap a related topic to follow the thread - every page links to its prerequisites and to the ideas it unlocks. BUILT FOR FOCUS • Beautiful, calm visuals on a deep-space backdrop. • Smooth 60fps animations, gentle haptics, and confetti for the wins. • No ads. No accounts. No tracking. • Designed for iPhone and iPad with full split-view support. • Offline-first - everything is on device. WHO IT'S FOR Curious kids who want to know what makes things go. Students who'd rather feel an equation than memorize it. Self-learners coming back to math years later. Grad students looking for the cleanest one-page mental model of a topic. Teachers and parents who want a single shareable demo for any concept that comes up. If you've ever wondered why airplanes turn the way they do, why time slows down at high speeds, why a pendulum can be predictable AND chaotic, or what a quantum bit actually is - this is the app. One scroll. One slider. One badge at a time. The universe, unlocked.
Screenshots
Verdict
The clearest difference is update cadence: Physics Playground App at weekly against Eurêkoi's every 10 months. Eurêkoi's advantage is iOS requirement (14.0 vs 18). On price, ads, in-app purchases and monetization model there is nothing between them.
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.
Eurêkoi ships an update every 10 months, Physics Playground App weekly. The most recent releases landed on October 1, 2026 and October 14, 2026 respectively.
| Parameter | Eurêkoi | Physics Playground App |
|---|---|---|
| Price | Free | Free |
| Rating | — | 3.0 (1 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | — | 1 — better |
| Update frequency | Every 10 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 14.0 — better | 18 |
| Further details — not scored | ||
| Size | 14 MB | 29 MB |
| Age rating | 17+ | 4+ |
| Developer | Bibliothèque Publique d'Information | AJA Digital LLC |
Customer experience
Eurêkoi
Physics Playground App
In-app purchases
Eurêkoi
No in-app purchases
Physics Playground App
No in-app purchases
Questions
Is Eurêkoi free?
Is Physics Playground App free?
Do Eurêkoi or Physics Playground App have ads?
Which is updated more often, Eurêkoi or Physics Playground App?
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