Photronium vs Electronify
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Photronium
Access over 360 physics equations with clear explanations and powerful search tools. Test your knowledge with custom quizzes and learn offline anywhere, anytime. This educational reference is designed for learners of all levels.
- 360+ physics equations
- Offline access
- Intelligent Search
- Symbol Search
- Customizable quizzes
- Bookmarking
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With over 360 physics equations explained in a clear, easy-to-understand way and a flexible search system, Photronium can be an immensely helpful tool for learners of any level. PHYSICS AT YOUR FINGERTIPS Look up any physics equation, with topics including: • Motion in One Dimension • Projectile Motion • Laws of Motion • Uniform Circular Motion • Work and Energy • Linear Momentum and Collisions • Rotation of Rigid Bodies • Universal Gravitation • Fluid Mechanics • Oscillatory Motion • Wave Motion • Sound Waves • Thermodynamics • Electromagnetism • Light and Optics • Relativity • Quantum Physics All available offline, so you can learn anywhere, anytime. MEMORY QUIZ Test your knowledge by taking quizzes! Bookmark any section that interests you, and Photronium will automatically create quizzes based on those bookmarks. INTELLIGENT SEARCH & SYMBOL SEARCH Just type anything. Intelligent Search can work with the most ambiguous descriptions, like “atom”, “lens”, “radiation”, “Newton”, and “phase angle”. And when you need to find a physics formula without any description, Symbol Search provides a discovery experience you’ve never seen before. FREE & NO ADS Photronium comes with over 360 physics equations, Intelligent Search, Symbol Search, Widgets, Bookmarks, Suggested Websites, and Dark Mode all available for free and ad-free. With Extras, you can purchase more features and support the app’s development. Have questions or feedback? From the app, open Extras and send a report.
Electronify
Explore the fundamental concepts of quantum mechanics, including atomic orbitals and electron behavior. Visualize molecular shapes using VSEPR theory to understand the properties of atoms and molecules.
- Atomic orbital visualization
- Electron probability depiction
- Spherical harmonics representation
- VSEPR theory model
- Molecular geometry prediction
- Atom and molecule behavior insights
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Quantum mechanics is a fascinating field that helps us understand the behavior of matter and energy on a microscopic level. One of the most important concepts in quantum mechanics is the idea of atomic orbitals. An atomic orbital is a mathematical function that describes the probability of finding an electron in a particular location around an atom's nucleus. Each electron in an atom can be described by a unique set of four quantum numbers, which determine its energy level, angular momentum, magnetic moment, and spin. The shape of each atomic orbital can be accurately depicted using a formula called spherical harmonics, which creates a visual representation of the electron's probable location around the nucleus. These representations are often shown as a series of dots, each representing a probable location of where an electron might be. The VSEPR (Valence Shell Electron Pair Repulsion) theory, on the other hand, is a model used to predict the geometry of molecules based on the arrangement of electrons in their valence shells. According to this theory, the electrons in a molecule's valence shell repel each other, and their repulsion determines the molecule's shape. The VSEPR model predicts a range of molecular shapes, including linear, trigonal planar, tetrahedral, trigonal bipyramidal, and octahedral. These shapes can be used to predict a molecule's physical and chemical properties, such as polarity and reactivity. This app will provide you these fascinating insights about the nature of how atoms and molecules behave in the real world. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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Verdict
The clearest difference is monetization model: Electronify at free against Photronium's free with in-app purchases. Photronium's advantage is ratings volume (10 vs 1). On price, rating, update cadence and ads 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. Photronium sells 1 one-off in-app purchase and Electronify sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 5.0 for Photronium against 5.0 for Electronify. That said, the two scores are not equally well evidenced: Photronium has 10 ratings behind it against 1, so its average is the more settled of the two.
Photronium ships an update monthly, Electronify every 2 weeks. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.
| Parameter | Photronium | Electronify |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (10 ratings) | 5.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 10 — better | 1 |
| Update frequency | Monthly | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.4 | 15.1 — better |
| Further details — not scored | ||
| Size | 59 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | Hao Nguyen | Wonmo Seong |
Customer experience
Photronium
Electronify
In-app purchases
Photronium
- Multicolored Bookmarks$0.99
Electronify
- Californium Pass$4.991 Month
- Einsteinium Pass$12.991 Month









