Chirys Draw vs EndNote
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Chirys Draw
Easily create complex molecular structures and reaction schemes with intuitive gestures. This app offers chemically aware text, automatic calculations, and publication-quality export options for scientists and students.
- Draw complex molecular structures and reaction schemes
- Chemically aware text and automatic calculations
- Intuitive circle gesture for ring creation
- Publication-quality image and PDF export
- Airdrop sharing and cross-platform compatibility
- Import/export MOL files
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Draw complex molecular structures and reaction schemes using your fingertips. An easy circle gesture (U.S. Patent No. 9754085 and No. 10,424,399) makes even complicated polycyclic rings easy and fun to draw. Multiple double bonds or multiple functional groups are simple to add all at one time. Annotation and reaction condition text is chemically aware and properly subscripts numbers. With over 175k downloads, Chirys Draw is speeding the way scientists draw and communicate. Imagine what you will create! Take notes at those seminars or class lectures! Present your ideas at project or group meetings! Draw structures and reaction schemes for your next paper! See the how-to videos on the Chirys web site. Key Features: • Create saturated, aromatic rings and chains • Draw reactions and reaction schemes with reaction conditions • Draw retrosynthetic pathways • Create multi-line text annotations with fonts and colors • Create complex fused and spirocyclic ring systems • Generate ion pairs • Airdrop sharing with colleagues • Airdrop transfer to your Macintosh • Copy and paste images or PDFs into Pages®, Keynote®, and other applications • Copy images to the Camera Roll • Send images of molecular structures by email, ready for publication • Make publication-quality prints and images • User-defined Groups • Export drawings as a scalable graphics PDF • Import and export molecules as MOL files Additional Features: • Automatic identification of molecular formulas in text • Molecular formula, weight, elemental composition, and exact mass calculations • Automatic layout of functional groups • Resonance and equilibrium arrows • 24 levels of undo and redo User feedback: “Wow. First of all, please let me say that this is the single best iPad application that I have ever used (not to mention one of the best structure drawing programs on any platform). You really nailed using gestures to design and manipulate structures. The app is an awesome example of harnessing the spirit of the iPad. I was up and drawing in 30 seconds. The interface is clean, intuitive, and so very well designed. Beautiful output too.” — Stephen “I use this for all my structure drawing needs now - desktop applications are so expensive and actually harder to use than Chirys Draw. Developer is very responsive. Improvements to the app keep coming. If you're a student, or a lecturer like myself, and need to draw quality chemical structures, then look no further. Exporting features make it easy to create a structure, then email to yourself for incorporation into a Powerpoint, Keynote, Word or any other sort of document. Highly recommended, and well worth the cost (much cheaper than desktop apps and for most purposes just as functional).” — Australian user “Extremely well-done, very easy to learn, and elegant. It will be easier and faster other competitors to sketch high-quality structures and could be really handy for taking notes in meetings.” — Jeff “Brilliant addition to the iPad workload. This is clearly a creative application and the most full featured molecular drawing app. I think the developers here have the most motivation, and have put more original thought into this. I hope they will be encouraged to continue with their vision…” — Cascade “I wanted to let you know directly how much I appreciate this app. It works exactly as advertised, is highly capable, and is now substituting for a desktop-based chemical structure drawing app. I am right now using it to prepare structures for my pharmacognosy lectures, and it is working well.” — Ian “The words that come to mind: Impressive. Quality. The development of Chirys Draw shows your deep, consistent, and scholarly chemistry flair and precision, and is impressive. Professional chemists will continue to love this.” — Atsuo “ChirysDraw represents the best chemical drawing package to date on the iPad.” — Brian “Thank you again for such a lovely program.” — Olivia
EndNote
Manage your research from anywhere with this popular tool. Organize, search, and share academic papers and bibliographies seamlessly across devices. Sync your library and annotate PDFs on the go.
- Sync research library across devices
- Search academic databases
- Annotate PDFs
- Import reference file formats
- Share references with collaborators
- Attach files from cloud storage
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Collect, collaborate, create from anywhere with the EndNote app - the world's most popular research management tool. With flexible tools for searching, organizing, sharing research, and creating bibliographies, the EndNote app extends your ability to stay on top of cutting edge research and connect with your EndNote library on the go. EndNote enables you to easily view, edit, organize, and share research material on your iOS device. By syncing your research library across iOS, online, and desktop, you increase the power of EndNote by gaining seamless access to your reference library from multiple devices and platforms. The EndNote app includes: - Sign up for a free, EndNote online account or sign in to an existing account - Synchronize your library references, attachments, and PDF annotations to your online account and EndNote desktop - Built in web browser to search Clarivate Analytics Web of Science, PubMed, Google Scholar, your library catalog, or any other database you choose - Built in PDF viewer with wide range of annotation features. Annotations made can be synced and edited online and on the EndNote desktop - Importing capabilities for .ris, .nbib, and other popular reference file formats - Email and copy options for sharing references and file attachments with collaborators - EndNote “temporary citation” format support - Attach files from Dropbox, OneDrive or Google Drive to your references (accounts available separately) - Viewing and editing options for references and file attachments - Sorting, searching, and grouping options for references and file attachments - Getting Started Guide documentation
Screenshots
Verdict
Chirys Draw and EndNote both sit at 2.6 stars, but that hides the real split: 67% of Chirys Draw's written reviews are positive against 28% of EndNote's. Chirys Draw also leads on monetization model (free vs free with in-app purchases) and iOS requirement (10.0 vs 15.0). EndNote's advantage is ratings volume (165 vs 8) and update cadence (every 4 months vs every 9 months). On price, rating, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 2.6 for Chirys Draw against 2.6 for EndNote. That said, the two scores are not equally well evidenced: EndNote has 165 ratings behind it against 8, so its average is the more settled of the two. Written reviews are what separate them: 67% of Chirys Draw's written reviews are positive against 28% of EndNote's.
Chirys Draw ships an update every 9 months, EndNote every 4 months. The most recent releases landed on October 15, 2026 and October 11, 2026 respectively.
| Parameter | Chirys Draw | EndNote |
|---|---|---|
| Price | Free | Free |
| Rating | 2.6 (8 ratings) | 2.6 (165 ratings) |
| Positive reviews | 66.7% of reviews — better | 27.8% of reviews |
| Number of ratings | 8 | 165 — better |
| Update frequency | Every 9 months | Every 4 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 10.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 18 MB | 91 MB |
| Age rating | 4+ | 17+ |
| Developer | John Clark | Clarivate Analytics (US) LLC |
Customer experience
Chirys Draw
EndNote
Bugs and requests
Chirys Draw
Not enough reviews yet to summarise bugs or requests.
EndNote
Reported bugs
5 issues- Crashes when editing references
- Indexing issues and lost library data
- Compatibility problems with iOS updates
- PDF viewer issues (e.g. no rotation, lost page position)
- Login and authentication problems
Requested features
5 requests- Cite while you write functionality
- Better PDF annotation tools (e.g. eraser, text notes)
- Support for group sets and nested folders
- Automatic citation data population from PDFs
- Improved syncing and offline access
In-app purchases
Chirys Draw
No in-app purchases
EndNote
No in-app purchases








