The Elements by Theodore Gray

Most chemistry apps treat the periodic table as a spreadsheet with colors. The Elements by Theodore Gray treats it as a set of physical objects. Every cell of the table holds a slowly rotating photograph of a real sample, and that first impression sets the tone for everything else.

The app is an interactive version of Gray’s best-selling photographic book, published under NatureGuides Ltd. The idea is simple. Each element gets a page with Gray’s stories about where it comes from, how people use it and the strange facts that make it memorable. Next to the stories sits the standard reference data: atomic weight, density, melting and boiling points, electronegativity and discovery details. What makes it different is what surrounds that text: more than 500 photographed objects designed to be spun, turned and pinch-zoomed from every angle.

Its market position is unusual. It isn’t a study-drill app, a flashcard system or a test-prep tool. It’s closer to a coffee-table book that has learned to move. That puts it in a small category of premium, author-led reference apps that ask for a one-time $9.99 and deliver a finished, polished product in return, with no subscription.

It earns that price. It holds about 4.6 out of 5 across roughly 122 US App Store ratings. Apple’s editors gave it an Editors’ Choice badge and called it a “fully interactive version of the periodic table.” Chemistry students and fans of the print edition often say the app improves on the book. That’s rare praise for a digital adaptation, and it’s largely deserved.

The audience is broad on purpose. It works as a reference for students and a classroom showpiece for teachers. It also suits anyone who has wondered what tungsten actually looks like, or why gallium melts in your hand. It’s available in 17 languages, which widens that audience well beyond English-speaking classrooms.

• Living Periodic Table: The home screen is a full periodic table where every element appears as a slowly rotating photo of a real sample. It serves as both navigation and a first lesson.
• 500+ Rotatable, Zoomable Objects: Pure samples, minerals and everyday products that contain each element, built to be spun freely and pinch-zoomed for fine detail from every side.
• Theodore Gray’s Writing: Each element page carries Gray’s stories about where the element comes from, how it’s used and the odd facts about it. The writing reads like a smart friend talking, not a textbook.
• Property Data: Atomic weight, density, melting and boiling points, electronegativity and discovery details sit alongside the stories for quick reference.
• Stereoscopic 3D: The photographs can be viewed in stereoscopic 3D, adding real depth to the samples.
• 17 Languages: Broad localization makes it usable in classrooms around the world.
• Universal Apple Support: Designed for iPad first, but it also runs on iPhone and Apple Silicon Macs.

The Core Idea: Objects Before Abstractions

Chemistry education has a long-standing problem. The periodic table is a set of abstractions: symbols, numbers, electron shells. Most students never connect those abstractions to physical things. The Elements attacks that gap directly. Before a reader reaches a word about bismuth, its iridescent, stair-stepped crystals are already rotating on the screen. The object comes first and the explanation second. That order is the app’s central design choice, and it’s the right one.

Its strength is how much physical material it shows for each element. Gray doesn’t stop at a pure sample. He also shows the minerals an element is refined from and the everyday products that contain it. Each element becomes a small story that runs from the ground, through the refinery, to your kitchen drawer. That context is what printed tables and most competing apps leave out.

Interaction Model: Touch as Curiosity

The main interaction is direct manipulation. There’s no “rotate” button. You grab the object and turn it. Pinch-zoom moves from a whole ingot to its surface texture. This is a rare educational app where the touch interface is itself the main way of learning. Touching the object is how you learn about it. Turning a sample to catch the light on its surface teaches more about metallic luster than a sentence about luster ever could.

The flow from table to element page is shallow and easy to read. Tap an element and its page opens. The stories and the data sit together, so a student looking up a melting point for homework will also run into a paragraph about why that melting point matters. That accidental learning is where the app pays off. It rewards wandering.

The Writing Carries the Load

Gorgeous photography with dull writing would have made this a screensaver. Gray’s text keeps it from becoming one. His voice is curious, funny and confident. He writes like someone who actually owns and handles these samples, not someone summarizing an encyclopedia. The digital format also helps the text: it sits next to objects that can be moved, so it never has to describe what the image already shows. Reviewers often cite the writing as the reason the app beats the printed book.

Where It Stops Short

This is a reference work, and it doesn’t pretend otherwise. There’s no structured learning path, no progress tracking and no assessment layer. Teachers who want a tool that drills students on electron configurations will have to look elsewhere. The app sparks curiosity. It doesn’t grade it. For a self-directed learner that’s fine. For a curriculum-driven classroom, it’s a supplement at best.

The property data is also reference-grade rather than exploratory. An element’s electronegativity can be read, but the app doesn’t let you compare it across the table. There’s no heat map or graph showing how a property changes along a row. That’s a missed opportunity for an app whose home screen is already a table, and it’s the clearest place where the book’s origins limit what the software could do.

Stereoscopic 3D: Novelty With a Point

The stereoscopic 3D mode could easily have been a gimmick. Here it has a real reason to exist, because the whole premise of the app is that these are real physical objects. Adding depth reinforces that. It won’t be how most people use the app day to day, but it’s a well-chosen extra, not a checkbox feature.

The visual direction is simple: dark backgrounds, carefully lit samples and typography that stays out of the way. The photography is the interface. The samples are built to rotate smoothly, and the zoomed images carry enough detail that pinching in should reveal something new rather than blurry pixels. That quality explains the app’s biggest technical cost: a download of about 1.7 GB. On a base-storage iPhone, that’s a real request. On a shared classroom iPad that is already full of apps, it may decide whether the app gets installed at all.

The trade-off is fair. The file is large because the assets are high quality, and cutting the image resolution would defeat the point of the app. Free storage is still worth checking before buying.

iPad is the main platform, and it shows. The large screen gives the periodic table room, and the rotating samples are big enough to reward close handling. This is the version to recommend, and the one anyone should use.

iPhone support exists, but the experience shrinks. A full periodic table on a phone screen makes each animated cell tiny, and the sense of browsing a museum fades when the exhibits are thumbnail-sized. It’s fine for a quick lookup and weaker for exploring.

Apple Silicon Macs can run it as well. That’s useful for teachers projecting it in a classroom, though an app built around pinching and spinning naturally loses some of its tactile appeal with a mouse or trackpad.

There’s no Android version, which rules it out for schools running Chromebooks or Android tablets. For a product this widely used in education, that’s a real gap.

The Elements by Theodore Gray does what few digital adaptations manage: it’s clearly better than the book it came from. The rotating photographs aren’t decoration. They’re the lesson. Paired with writing that has real personality, they turn the most memorized chart in science into something worth exploring.

It isn’t a complete chemistry curriculum. The lack of comparison tools and structured study features keeps it from being a teacher’s only tool, and the missing Android version is a real problem for schools. But as a reference to reopen just to spin a lump of osmium, it has little real competition. On an iPad it’s easy to recommend, and $9.99 is a fair price for what it delivers.