Comparison

The Elements by Theodore Gray vs Elementium

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

Head to head
About

The Elements by Theodore Gray

Explore the building blocks of the universe with this interactive guide to the periodic table. Discover beautifully photographed elements, fascinating stories, and detailed 3D models of over 500 objects, all presented in multiple languages.

Highlights
  • Living periodic table interface
  • Rotating 3D element samples
  • Detailed 3D object models
  • Pinch-zoom and 3D stereo viewing
  • Multilingual support
  • Fascinating stories and facts
Features
Read full description

From Theodore Gray comes a beautifully produced app introducing and educating users on the elements of the periodic table and how they combine to form the world around us. The Elements is a rich and engaging love story, told in words and pictures - allowing you to experience the beauty and fascination of the building blocks of our universe in a way you've never seen before. Start off on a living periodic table where every element is shown with a smoothly rotating sample. To read about gold, tap the gold nugget. Immediately you see the sample filling the screen, photographed to razor sharpness and rotating around a complete circle in front of your eyes. Enjoy the extensive array of facts and figures. Next find a fascinating story about the element, surrounded by carefully photographed objects representing it. Every one of these objects, well over 500 in total, is a freely rotatable, live object that you can examine from all sides and pinch zoom to see in unprecedented detail. Touch the element name at the top of the page and you can see that element’s name in over a dozen different languages. Choose one and you’ll find that the entire book, stories, captions and all, switches to that language: The Elements includes both the full English original text and over a dozen full translations. Pinch-zoom or tap any object to bring it up full screen, where you can split into a pair of stereo 3D images, allowing you to see all 500 objects pop off the screen in 3D, and you can spin the objects, in 3D, with the touch of a finger. This book will show everyone there’s a lot more to the periodic table than a bunch of numbers and letters. Features include: • Beautifully composed pages for every Element in the periodic table • Fun stories and fascinating facts • All objects pinch-zoom with amazing detail and rotate in 3D • Engaging introduction explaining the structure of the periodic table • Engaging introduction explaining the structure of the periodic table • Fully translated into English, Catalan, Croatian, Dutch, Finnish, French, German, Italian, Japanese, Korean, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Swedish, Turkish ------------ Reviews: “The iPad’s splendor and power may be best shown by The Elements... it’s not like any ebook you’ve seen. The periodic table of elements comes to life.” – USA Today

About

Elementium

Access comprehensive information on every element of the periodic table. Explore detailed data, visualize trends, and utilize a built-in solubility calculator. Perfect for students and professionals needing quick, accurate chemical data.

Highlights
  • Detailed element information
  • Interactive periodic table
  • Dynamic filtering and trend visualization
  • Solubility calculator
  • Element image library
  • Bohr model visualizations
  • Home screen widgets
Features
Read full description

The premiere periodic table app for iPhone, iPad, and Apple TV. Quickly reference any element and all the information you need. Search for elements by on classification, phase, orbital, mass, or number. Dynamic filters help you understand periodic trends, like electronegativity, at a glance. Dive even deeper to get standard, frequently-used data points such as mass, electronegativity, radius, radioactivity, electron configuration, and more. LEARN Each element prominently features: • Symbol, name, and number • Atomic mass • Electronegativity • Electron configuration • Atomic radius • Melting and boiling points • Year of discovery • State at STP • Radioactivity Elements are also accompanied by discussions on its uses, discovery, and more. You can quickly find more information and publications about each element via links to Wikipedia, Science Direct®, and the American Chemical Society®. EXPLORE The periodic table is laid out in a clear, concise manner that adapts to the size of your screen. No more squinting at blurry images of the periodic table from web searches. Beautiful color-coding helps you quickly distinguish element classifications, phases at STP, electronegativity, and atomic radius. Trends and filtering help students who are learning chemistry to visualize patterns. SOLUBILITY CALCUALTOR A built in solubility calculator* answers all your, "is this soluble in that", questions. Just specify a solvent and a solute to check their compatibility. A solubility lookup table is also available for cross-referencing multiple combinations. VISUALIZATIONS See beautiful depictions of elements from raw to processed, and in other forms. The extensive library of images help you understand what your lab samples should look like, or may be helpful to students learning about chemistry.* SEARCH Search for elements by name, symbol, mass, or number from within Elementium™ or via Spotlight. Results are shown directly on the periodic table. Need faster access to element information? Search directly from Spotlight on the lock screen or home screen of your device. BOHR MODELS Animated Bohr models for each element help visualize how electrons are oriented around the nucleus.* WRITE & REPORT Academics and students writing reports and using data frequently in the classroom or the lab can simply tap on an aspect of an element to export its information.* HOME SCREEN WIDGETS Add the Periodic Table widget to your home screen for quick and easy reference to the Periodic Table. Or, try out the "random element" widget which is useful for students. ADDITIONAL NICE THINGS • Custom app icons • Set temperature and atomic radius to your preferred units • Search Spotlight for elements • Thoughtfully developed with accessibility in mind • A subscription is totally optional • No account required • Privacy focused (no tracking, no data collection) ------- ION Subscription Notice Subscription prices vary by duration and may vary by location. Subscriptions will be charged to your credit card through your iTunes account. Your subscription will automatically renew unless canceled within 24-hours before the end of the current period. You can cancel anytime with your iTunes account settings. Manage your subscriptions in Account Settings after purchase. Privacy Policy: https://spencer-software.com/elementium/privacy Terms of Service: https://spencer-software.com/elementium/tos ------- *Requires in-app purchase. Elementium™ is a trademark of Samuel Spencer.

Screenshots

The Elements by Theodore Gray4 screens
Elementium4 screens

Verdict

The call

The clearest difference is price: Elementium at Free against The Elements by Theodore Gray's $9.99. Elementium also leads on update cadence (every 3 weeks vs every 3 months) and ratings volume (576 vs 122). The Elements by Theodore Gray's advantage is in-app purchases (none vs 9). On rating, review sentiment, ads and device support 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

Elementium is free to download; The Elements by Theodore Gray costs $9.99 up front. Elementium sells 9 in-app purchases, starting at $1.99 per month. The Elements by Theodore Gray asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.6 for The Elements by Theodore Gray against 4.6 for Elementium. Both are backed by a comparable volume of ratings — 122 and 576 respectively. Written reviews are what separate them: 73% of The Elements by Theodore Gray's written reviews are positive against 75% of Elementium's.

UpkeepUpdate frequency

The Elements by Theodore Gray ships an update every 3 months, Elementium every 3 weeks. The most recent releases landed on October 14, 2026 and October 12, 2026 respectively.

Scorecard5 real differences · 5 level
The Elements by Theodore Gray versus Elementium: the parameters behind the verdict, then further details
ParameterThe Elements by Theodore GrayElementium
Price$9.99Free — better
Rating4.6 (122 ratings)4.6 (576 ratings)
Positive reviews73.0% of reviews75.0% of reviews — better
Number of ratings122576 — better
Update frequencyEvery 3 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFreemium — better
DevicesiPhone, iPadiPhone, iPad, Apple TV — better
Requires iOS17.016.1 — better
Further details — not scored
Size1.5 GB752 MB
Age rating4+4+
DeveloperNatureGuides Ltd.Samuel Spencer

Customer experience

The Elements by Theodore Gray

All ratings122 ratings
Positive89.3%
Neutral3.3%
Negative7.4%
Written reviews477 reviews
Positive73.0%
Neutral9.6%
Negative17.4%

Elementium

All ratings576 ratings
Positive91.5%
Neutral3.3%
Negative5.2%
Written reviews32 reviews
Positive75.0%
Neutral6.3%
Negative18.8%

User reviews

The Elements by Theodore Gray

From 122 App Store ratings

What we love

  • 💎 Stunning visuals and 3D animations
  • 📚 Comprehensive information on elements
  • 🎨 Engaging and humorous writing style
  • 🏫 Excellent educational tool for all ages

Room to improve

  • 🔍 Difficult to navigate and find specific elements
  • 🔌 Massive file size takes up a lot of storage
  • 🐛 Frequent crashes and stability issues
  • 💰 Expensive for the limited content

Elementium

From 576 App Store ratings

What we love

  • 👍 User-friendly and intuitive interface
  • 📚 Comprehensive element information and data
  • 🎨 Beautiful, clean, and visually appealing design
  • 🔗 Helpful Wikipedia and external resource links
  • 📖 Excellent for educational purposes and studying

Room to improve

  • 💰 Expensive subscription model for premium features
  • 🔐 Paywall blocking key features and element images
  • 📺 Intrusive ads and purchase prompts on startup
  • 🎨 Poor color contrast on metalloid background text
  • 📱 Crashes on older devices (iPhone 6G iPod Touch, iPhone XS Max)

Bugs and requests

The Elements by Theodore Gray

Reported bugs

3 issues
  • Element descriptions cut off on iPhone 6 Plus
  • Crashes when switching landscape orientations
  • Unable to download app after initial purchase

Requested features

4 requests
  • Add option to disable animations
  • Improve periodic table navigation
  • Include more detailed scientific information
  • Support multiple languages and spellings

Elementium

Reported bugs

5 issues
  • App crashes on startup and when tapping elements
  • Crashes on older iOS devices and iPod Touch
  • Molar mass not visible in iPhone landscape orientation
  • Intrusive purchase prompt that's difficult to dismiss
  • Rating request spam appearing too early in user experience

Requested features

5 requests
  • Element images and visual representations
  • One-time purchase option instead of subscription
  • Zoom out to view entire periodic table at once
  • Better display of molar mass on iPhone in landscape mode
  • More detailed information and content

In-app purchases

None

The Elements by Theodore Gray

No in-app purchases

9 purchases

Elementium

Subscriptions4
  • ION, 1 month1 Month trial$1.991 Month
  • ION, 3 Months3 Days trial$3.993 Months
  • ION, 6 months$5.996 Months
Show 1 more
  • ION, 1 year$9.991 Year
One-time5
  • Export Data$0.99
  • Bohr Models$1.99
  • Advanced Sorting$2.99
Show 2 more
  • Visual Elements$3.99
  • Advanced Tools$4.99

Questions

Is The Elements by Theodore Gray free?
The Elements by Theodore Gray costs $9.99, with no in-app purchases.
Is Elementium free?
Elementium is free to download, with in-app purchases available.
Which has better reviews, The Elements by Theodore Gray or Elementium?
The Elements by Theodore Gray and Elementium are both rated 4.6 out of 5 on the App Store, from 122 and 576 ratings respectively.
Do The Elements by Theodore Gray or Elementium have ads?
Neither The Elements by Theodore Gray nor Elementium shows ads.
Which is updated more often, The Elements by Theodore Gray or Elementium?
The Elements by Theodore Gray ships an update every 3 months, and Elementium every 3 weeks. Most recently, The Elements by Theodore Gray was updated on October 14, 2026 and Elementium on October 12, 2026.

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