Comparison

Molecule World vs Chemistry Widget

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

Head to head
About

Molecule World

Explore and analyze 3D molecular structures, connecting sequence data to their 3D forms. Visualize proteins, DNA, RNA, and small molecules with interactive tools for scientists, educators, and students.

Highlights
  • 3D molecular visualization
  • Sequence and structure comparison
  • Experimental and computational structure support
  • Interactive 3D rendering
  • Structure library management
  • Molecular content creation tools (Pro)
Features
Read full description

A modern 3D molecular workspace that makes exploring the connections between sequence, structure, and function accessible to a new generation of scientists, educators, and students. Molecule World 5.0 is built for how molecular structures are explored and designed today. View, compare, align, and explore experimental structures and computationally generated models together. Compare normal and mutant proteins, investigate structural differences, and connect sequence changes to their 3D consequences. Explore proteins, DNA, RNA, and small molecules on iPhone, iPad, and Mac. Rotate, zoom, and pan through structures with high-quality interactive 3D visualization. Molecule World brings structure viewing, sequence analysis, molecular comparison, and educational tools together in one app. EXPERIMENTAL AND COMPUTATIONAL STRUCTURES Open structures from X-ray crystallography, cryo-EM, and NMR alongside computationally generated models. Search RCSB PDB, NCBI MMDB, and PubChem by ID or keyword and download structures directly into your library. SEQUENCE AND STRUCTURE The sequence viewer on iPad and Mac shows every chain as a row of residues colored to match the 3D view. Copies of a molecule line up in shared columns, while superimposed models read down the same columns. See sequence differences in context and investigate their structural consequences. POWERFUL VISUALIZATION Choose Spacefill, Ball & Stick, Tubes, Ribbon, Surface, or Wire Surface representations. Color by element, secondary structure, chain, sequence, assembly, conserved domain, residue type, charge, hydrophobicity, or B-factor. Show proteins, nucleic acids, or chemical components alone, or reduce chains to their backbone or Cα trace. A color key shows what is on screen, while the Info card reports what a structure is, how it was determined, and what it contains. YOUR LIBRARY Keep structures in folders, synced through iCloud Drive or stored on the device. Filter your library by atoms, chains, resolution, confidence values, file type, source database, models, or scenes. MOLECULE WORLD PRO Pro adds tools for creating and saving molecular content. Selections: select residues in the sequence, search by variant, range, or motif, select residue neighbors, then style, color, hide, and lock them. Scenes: save named views, including selections, styles, and camera position, inside the structure file. Step through scenes to guide an exploration or create a presentation. Model sets: superimpose structures and compare how closely they align. Compare experimental structures, predicted models, variants, or alternative conformations, and save the model set and its comparison data for sharing. Collections: package structures, models, scenes, and descriptions into a single file. Hide selected structures for exercises and optionally lock the collection for distribution. Pro also includes undo and redo and high-resolution image capture. It is a single in-app purchase with no subscription and can be shared with Family Sharing. TEACH SEQUENCE, STRUCTURE, AND FUNCTION Build collections around a biological question. Give students related structures, variants, or predicted models and let them investigate the differences themselves. Use scenes to guide an exploration, hide structures for unknown-structure exercises, and move between aligned sequence and 3D structure to connect sequence changes with their structural consequences. Everything created with Pro opens in the free Molecule World viewer on iPhone, iPad, and Mac. Students and colleagues can explore collections, step through scenes and model sets, change views, and save images for assignments and presentations. BUILT FOR THE APPLE ECOSYSTEM Molecule World runs as a unified app on iPhone, iPad, and Mac. Optional iCloud support keeps your library available across devices. Molecule World is developed by Digital World Biology LLC, with support from National Science Foundation awards IIP 1315426 and DUE 2055036.

About

Chemistry Widget

Explore detailed profiles of every element on the periodic table, including their origins, uses, and scientific properties. This app offers interactive Home Screen widgets to discover new elements daily, making science accessible for students and enthusiasts.

Highlights
  • Detailed element profiles
  • Origins and etymology
  • Main uses and facts
  • Home Screen widgets
  • Filter by properties (radioactive, toxic)
  • Filter by group block
Features
Read full description

Meet the atoms that make up the universe! Chemistry Widget brings detailed element profiles with origins, etymology, main uses, and fascinating facts. Handy for students, teachers, or anyone curious about science and chemistry. Chemistry Widget keeps the Periodic Table of the Elements right in your pocket. Discover new elements every day with different types of Home Screen widgets. Learn the details of each element with etymology, uses, electron configuration, oxidation states, group and period, electronegativity, atomic radius, ionization energy, density, electron affinity, standard state, melting and boiling point, and the year it was discovered. Filter and highlight the elements by radioactive, toxic, explosive, or by group block: nonmetals, noble gases, alkali metals, alkaline earth metals, metalloids, post transition metals, transition metals, halogens, lanthanides, and actinides. We have many exciting updates planned, so stay tuned!

Screenshots

Molecule World4 screens
Chemistry Widget4 screens

Verdict

The call

The clearest difference is price: Molecule World at Free against Chemistry Widget's $1.99. Molecule World also leads on ratings volume (4 vs 1). Chemistry Widget's advantage is in-app purchases (none vs 1). On rating, review sentiment, 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

CostPrice · In-app purchases · Ads · Monetization

Molecule World is free to download; Chemistry Widget costs $1.99 up front. Molecule World sells 1 one-off in-app purchase. Chemistry Widget asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Molecule World against 5.0 for Chemistry Widget. Both are backed by a comparable volume of ratings — 4 and 1 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on November 6, 2026 and November 5, 2026 respectively.

Scorecard4 real differences · 6 level
Molecule World versus Chemistry Widget: the parameters behind the verdict, then further details
ParameterMolecule WorldChemistry Widget
PriceFree — better$1.99
Rating5.0 (4 ratings)5.0 (1 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings4 — better1
Update frequencyEvery 3 weeksEvery 3 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, Mac — betteriPhone, iPad
Requires iOS17.6 — better18.4
Further details — not scored
Size16 MB5 MB
Age rating4+4+
DeveloperDigital World Biology LLCCecile Lebleu

Customer experience

Molecule World

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Chemistry Widget

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Molecule World

One-time1
  • Molecule World Pro$29.99
None

Chemistry Widget

No in-app purchases

Questions

Is Molecule World free?
Molecule World is free to download, with in-app purchases available.
Is Chemistry Widget free?
Chemistry Widget costs $1.99, with no in-app purchases.
Which has better reviews, Molecule World or Chemistry Widget?
Molecule World and Chemistry Widget are both rated 5.0 out of 5 on the App Store, from 4 and 1 ratings respectively.
Do Molecule World or Chemistry Widget have ads?
Neither Molecule World nor Chemistry Widget shows ads.
Which is updated more often, Molecule World or Chemistry Widget?
Molecule World ships an update every 3 weeks, and Chemistry Widget every 3 weeks. Most recently, Molecule World was updated on November 6, 2026 and Chemistry Widget on November 5, 2026.

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