Comparison

Molecule World vs Ivy Notes

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 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.

Highlights
  • 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 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.

About

Ivy Notes

Features
Read full description

Ivy Notes keeps planning, notes, focus sessions, and resume building in one calm study workspace. Plan with less friction - Organize today's tasks and weekly commitments - Add subjects, due times, and time estimates - Track progress without turning study into busywork Write clear Markdown notes - Capture lecture notes, reading notes, and drafts - Keep material organized by category - Connect related ideas with WikiLinks, backlinks, and a Markdown table of contents - Share notes or export study cards when you need them Stay focused - Run Pomodoro-style focus sessions - Build a repeatable rhythm for class, reading, and writing - Review completed sessions alongside your task progress Turn work into a resume - Keep resume drafts close to your notes and plans - Export clean PDF resumes when you're ready to apply Built for Apple devices - Use Ivy Notes on iPhone, iPad, and Mac - Sync with iCloud when available - Move notes to nearby devices when you're together Ivy Notes is made for students and early-career learners who want a quieter way to plan, write, and keep moving.

Screenshots

Molecule World4 screens
Ivy Notes4 screens

Verdict

The call

The clearest difference is price: Molecule World at Free against Ivy Notes's $3.99. Ivy Notes's advantage is update cadence (every 3 weeks vs every 2 months). On ads, in-app purchases, device support and iOS requirement 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; Ivy Notes costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Molecule World ships an update every 2 months, Ivy Notes every 3 weeks. The most recent releases landed on September 20, 2026 and August 26, 2026 respectively.

Scorecard2 real differences · 8 level
Molecule World versus Ivy Notes: the parameters behind the verdict, then further details
ParameterMolecule WorldIvy Notes
PriceFree — better$3.99
Rating5.0 (4 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings4 — better—
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, MaciPhone, iPad, Mac
Requires iOS17.617.6
Further details — not scored
Size8 MB6 MB
Age rating4+17+
DeveloperDigital World Biology LLC树伟 杨

In-app purchases

None

Molecule World

No in-app purchases

None

Ivy Notes

No in-app purchases

Questions

Is Molecule World free?
Molecule World is free to download, with no in-app purchases.
Is Ivy Notes free?
Ivy Notes costs $3.99, with no in-app purchases.
Do Molecule World or Ivy Notes have ads?
Neither Molecule World nor Ivy Notes shows ads.
Which is updated more often, Molecule World or Ivy Notes?
Molecule World ships an update every 2 months, and Ivy Notes every 3 weeks. Most recently, Molecule World was updated on September 20, 2026 and Ivy Notes on August 26, 2026.

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