Comparison

Elementium vs Molecules by Theodore Gray

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

Head to head
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.

About

Molecules by Theodore Gray

Explore the molecular world with interactive simulations and detailed information. Discover how elements form compounds and witness the dynamic dance of quantum mechanics through touch. This app offers a fun and educational way to understand the nature of substances.

Highlights
  • Touch-interactive molecular dynamics simulation
  • Bend, squeeze, and shape molecules
  • Adjust temperature to observe reactions
  • Full text of the 'Molecules' book
  • Interactive object rotations
  • Dozens of 'still life videos'
Features
Read full description

INCLUDED IN BEST OF 2014 “Few iOS apps are as thoughtfully designed as Molecules, and even fewer combine superb visuals with clear writing that encourages exploration.” – Macworld “Molecules uses its predecessor as a springboard to further greatness.” – Stuff A book about molecules, and a chance to touch, stretch and twist them! Molecules by Theodore Gray is the extraordinary sequel to The Elements, the bestselling book and app. It continues the story of the elements to show how they are assembled into the rich diversity of compounds, chemicals, molecules, rocks, and stuff that make up our world. The app includes an important world first: a touch-interactive molecular dynamics simulation that lets you poke and prod hundreds of different molecules, seeing how each one reacts to your touch. Molecules are not static things – they twist, turn, vibrate, and spin in an elaborate and beautiful dance of quantum mechanics. The app incorporates the NAMD simulation engine developed by the Theoretical and Computational Biophysics Group at the University of Illinois. These are serious, scientifically accurate simulations. A few minutes playing with them will give you a deeper intuition about the true nature of molecules than years of study on paper. And while they are serious science, they are also a whole lot of fun to play with! In addition to the amazing wiggling molecules, the app contains the entire book of Molecules, with all the objects interactively rotatable so you can see them from all sides. Going further than The Elements, the app includes dozens of innovative and intriguing “still life videos” that reveal the true nature of substances through close-up interactive video. Features include: • Try out the first ever touchscreen-interactive molecular dynamics • Bend, squeeze and shape 348 different molecules using multiple fingers • Increase or decrease the temperature and see how molecules react • Read the full text of all 14 chapters of Molecules by Theodore Gray • Understand the movements of molecules in a special chapter for the app • See over 500 videos and rotations of incredible objects photographed by Nick Mann If you like Molecules by Theodore Gray, don’t forget to rate it and leave a review.

Screenshots

Elementium4 screens
Molecules by Theodore Gray4 screens

Verdict

The call

The clearest difference is price: Elementium at Free against Molecules by Theodore Gray's $9.99. Elementium also leads on update cadence (every 3 weeks vs every 6 months) and ratings volume (576 vs 29). Molecules by Theodore Gray's advantage is in-app purchases (none vs 9) and iOS requirement (12.1 vs 16.1). 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; Molecules by Theodore Gray costs $9.99 up front. Elementium sells 9 in-app purchases, starting at $1.99 per month. Molecules 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 Elementium against 4.6 for Molecules by Theodore Gray. That said, the two scores are not equally well evidenced: Elementium has 576 ratings behind it against 29, so its average is the more settled of the two. Written reviews split almost evenly too, at 75% and 75% positive.

UpkeepUpdate frequency

Elementium ships an update every 3 weeks, Molecules by Theodore Gray every 6 months. The most recent releases landed on October 16, 2026 and October 13, 2026 respectively.

Scorecard6 real differences · 4 level
Elementium versus Molecules by Theodore Gray: the parameters behind the verdict, then further details
ParameterElementiumMolecules by Theodore Gray
PriceFree — better$9.99
Rating4.6 (576 ratings)4.6 (29 ratings)
Positive reviews75.0% of reviews — better74.7% of reviews
Number of ratings576 — better29
Update frequencyEvery 3 weeks — betterEvery 6 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemium — betterPaid
DevicesiPhone, iPad, Apple TViPhone, iPad, iPod
Requires iOS16.112.1 — better
Further details — not scored
Size752 MB745 MB
Age rating4+12+
DeveloperSamuel SpencerNatureGuides Ltd.

Customer experience

Elementium

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

Molecules by Theodore Gray

All ratings29 ratings
Positive89.7%
Neutral3.4%
Negative6.9%
Written reviews87 reviews
Positive74.7%
Neutral17.2%
Negative8.0%

Bugs and requests

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

Molecules by Theodore Gray

Not enough reviews yet to summarise bugs or requests.

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
None

Molecules by Theodore Gray

No in-app purchases

Questions

Is Elementium free?
Elementium is free to download, with in-app purchases available.
Is Molecules by Theodore Gray free?
Molecules by Theodore Gray costs $9.99, with no in-app purchases.
Which has better reviews, Elementium or Molecules by Theodore Gray?
Elementium and Molecules by Theodore Gray are both rated 4.6 out of 5 on the App Store, from 576 and 29 ratings respectively.
Do Elementium or Molecules by Theodore Gray have ads?
Neither Elementium nor Molecules by Theodore Gray shows ads.
Which is updated more often, Elementium or Molecules by Theodore Gray?
Elementium ships an update every 3 weeks, and Molecules by Theodore Gray every 6 months. Most recently, Elementium was updated on October 16, 2026 and Molecules by Theodore Gray on October 13, 2026.

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