Molecule World vs Chemistry Widget
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Molecule World
Explore interactive 3D models of molecules, proteins, and DNA. This educational tool allows users to manipulate structures, experiment with visualization styles, and learn about chemical properties. Ideal for students and science enthusiasts of all ages.
- Interactive 3D molecule manipulation
- Experiment with drawing and coloring styles
- View and control molecular sequences (protein, DNA, RNA)
- Identify elements and investigate molecular properties
- Capture images of molecular structures
- Explore themed collections of molecules
Read full descriptionHide full description
Molecule World A modern molecular visualization app for iPhone, iPad, and Mac. Molecule World is back — completely redesigned for Apple's modern ecosystem. Developed, in part, with funding from the National Science Foundation* and recognized for its contributions to science education, Molecule World has been rebuilt from the ground up as a single, unified app for iPhone, iPad, and Mac (via Mac Catalyst). The new version pairs high-quality molecular visualization with a streamlined experience that follows you across every device. Explore Molecular Structures in 3D Students, educators, and researchers can interactively explore proteins, DNA, RNA, and small molecules in a fully three-dimensional environment. Rotate, zoom, and pan through structures with smooth, high-quality rendering built for clarity and scientific understanding. Bring In Structures From the Major Databases Open files you already have, or fetch structures right inside the app — search the Protein Data Bank, PubChem, and NCBI by ID or keyword and have them download and open in seconds. Connect Sequences to Structure and Function on iPad and Mac The sequence viewer (iPad & Mac) makes it easy to see the number and kind of sequences in a structure — protein, DNA, and RNA — along with its heterogens: modified amino acids and nucleotides within a sequence, and external organic and inorganic molecules such as ligands and ions. Each sequence is colored to match your current view. Powerful Visualization Tools - Smooth, interactive 3D — rotate, zoom, and pan - Multiple representation styles: ball-and-stick, space-filling, tubes, ribbon/cartoon, molecular surfaces, and wire mesh - Focused selections — show just proteins, nucleic acids, ligands, backbones, or alpha-carbon traces - Scientific color schemes — by element, chain, residue, secondary structure, charge, hydrophobicity, and B-factor - Clear, context-aware legends that explain exactly what you're looking at Designed for Education and Discovery Molecule World is used in classrooms and laboratories to support teaching in structural biology, chemistry, and molecular science. Educators can illustrate key concepts — protein folding, molecular interactions, and the structure of DNA and RNA — with visuals students manipulate themselves. Built for the Apple Ecosystem One app runs natively on iPhone, iPad, and Mac. Optional iCloud support keeps your library of structures — and your place in them — in sync across all your devices. Built for What's Next This release lays the foundation for upcoming features, including enhanced analysis tools, richer educational workflows, and professional research capabilities. *NSF awards IIP 1315426 and DUE 2055036 Molecule World is developed by Digital World Biology LLC.
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.
- Detailed element profiles
- Origins and etymology
- Main uses and facts
- Home Screen widgets
- Filter by properties (radioactive, toxic)
- Filter by group block
Read full descriptionHide 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
Verdict
The clearest difference is price: Molecule World at Free against Chemistry Widget's $0.99. Molecule World also leads on ratings volume (4 vs 1). Chemistry Widget's advantage is update cadence (every 3 weeks vs every 2 months). On rating, review sentiment, ads and in-app purchases 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
Molecule World is free to download; Chemistry Widget costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
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.
Molecule World ships an update every 2 months, Chemistry Widget every 3 weeks. Both last shipped on September 20, 2026.
| Parameter | Molecule World | Chemistry Widget |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 5.0 (4 ratings) | 5.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 4 — better | 1 |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, Mac — better | iPhone, iPad |
| Requires iOS | 17.6 — better | 18.4 |
| Further details — not scored | ||
| Size | 8 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Digital World Biology LLC | Cecile Lebleu |
Customer experience
Molecule World
Chemistry Widget
In-app purchases
Molecule World
No in-app purchases
Chemistry Widget
No in-app purchases
Questions
Is Molecule World free?
Is Chemistry Widget free?
Which has better reviews, Molecule World or Chemistry Widget?
Do Molecule World or Chemistry Widget have ads?
Which is updated more often, Molecule World or Chemistry Widget?
Other comparisons















