Comparison

MARVLS vs Physics Constants Library

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

Head to head
About

MARVLS

Explore quantum computing concepts through interactive augmented reality models. Requires a Merge Cube to visualize and manipulate topics like superposition and entanglement. Navigate through various educational modules to deepen your understanding.

Highlights
  • Augmented reality visualization
  • Interactive quantum concepts
  • Merge Cube integration
  • Topics: superposition, entanglement, qubits
  • Logic gates visualization
  • Nuclear and electron spin models
Features
Read full description

View augmented reality models of quantum computing concepts through your phone. You'll need a Merge Cube (link included to download). Click on different button to navigate to different topics. Tap the camera icon and point your camera towards the Merge Cube to visualize and interact with our MARVLS. Topics include observer dependency, superposition, entanglement, bits, qubits, nuclear and electron spin, logic gates, and trapped ions. Developer support provided by Leo Vanderlofske.

About

Physics Constants Library

Features
Read full description

Discover the building blocks of our universe with Physics Constants Library – the ultimate reference and learning tool for students, educators, and professionals. Whether you’re preparing for exams, teaching in the classroom, or working on research, this app puts the most important physics constants and tools at your fingertips. What You’ll Get • 20+ Fundamental Constants – Gravity, Planck’s constant, electron charge, speed of light, and more. • Smart Search & Filters – Quickly find constants by name, symbol, or value. • Multi-Unit Support – Switch between SI, CGS, Imperial, and other unit systems. • Interactive Learning – Use flashcards, quizzes, and study modes to strengthen memory. • Professional Tools – Unit converter, calculator, and built-in formula helper. • Offline Access – Access all content anytime, without internet. Key Features Constants Library • Covers mechanics, quantum physics, thermodynamics, electromagnetism, and more. • Includes historical context, real-world applications, and related concepts. Learning Center • Flashcards with smart repetition for long-term retention. • Quizzes with adjustable difficulty levels. • Study progress tracking to stay motivated. Professional Tools • Advanced unit converter with 25+ categories. • Scientific calculator with constants built-in. • Formula helper to apply equations instantly. Modern Experience • Clean, elegant interface designed for clarity. • Dark mode, 10 app themes - System, Light, Dark, Cosmic, Quantum, Sunset, Ocean, Forest, Aurora, Midnight and accessibility support. • Favorites tab for quick access to your most-used constants. Perfect For • Students – Learn and memorize constants with ease. • Teachers – Enhance lessons with interactive study tools. • Researchers & Engineers – Reliable, quick reference during work. • Enthusiasts – Explore the fundamental constants that shape our world. Data Accuracy You Can Trust All values are based on CODATA 2018 recommendations and NIST standards, ensuring precision for both academic and professional use. Upgrade for More Unlock premium to access advanced study modes, unlimited practice, and detailed progress analytics. Download Physics Constants Library today and take your physics knowledge to the next level!

Screenshots

MARVLS4 screens
Physics Constants Library4 screens

Verdict

The call

The clearest difference is in-app purchases: MARVLS at none against Physics Constants Library's 1. MARVLS also leads on ads (none vs shown) and update cadence (every 4 weeks vs every 7 months). On price, device support and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Physics Constants Library sells 1 one-off in-app purchase. MARVLS asks for nothing beyond the download.

UpkeepUpdate frequency

MARVLS ships an update every 4 weeks, Physics Constants Library every 7 months. The most recent releases landed on September 27, 2026 and September 20, 2026 respectively.

Scorecard3 real differences · 7 level
MARVLS versus Physics Constants Library: the parameters behind the verdict, then further details
ParameterMARVLSPhysics Constants Library
PriceFreeFree
Rating1.0 (1 ratings) — better—
Positive reviews66.7% of reviews—
Number of ratings1 — better—
Update frequencyEvery 4 weeks — betterEvery 7 months
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhoneiPhone
Requires iOS18.0 — better18.4
Further details — not scored
Size168 MB10 MB
Age rating4+4+
DeveloperMichele McColganChatStick Company Limited

In-app purchases

None

MARVLS

No in-app purchases

1 purchases

Physics Constants Library

One-time1
  • Unlock All Features$2.99

Questions

Is MARVLS free?
MARVLS is free to download, with no in-app purchases.
Is Physics Constants Library free?
Physics Constants Library is free to download, with in-app purchases available.
Do MARVLS or Physics Constants Library have ads?
Physics Constants Library shows ads; MARVLS does not.
Which is updated more often, MARVLS or Physics Constants Library?
MARVLS ships an update every 4 weeks, and Physics Constants Library every 7 months. Most recently, MARVLS was updated on September 27, 2026 and Physics Constants Library on September 20, 2026.

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