This website is biased toward ReShiki, because its maintainer also maintains ReShiki. Please be careful.
Chirys Draw
An iPad app for drawing molecular structures and reaction schemes and exporting publication figures.
Free. 13 of 65 checklist features confirmed.
Official demo
Main canvas
Needs iOS
Needs iOS
Default drawings
Needs iOS
Caffeine
Needs iOS
Paclitaxel
Needs iOS
Cholesterol in 3D
Facts
- Latest version
- 2.5
- Runs on
- iOS
- License
- Free App Store application.
- Price
- Free
- Relies on
- Not established. Patented gestures do not establish underlying canvas provenance; third-party chemistry libraries remain unverified.
- Main language
- Not published
- Other languages
- Not established
- Renderer
- Not established
- Third-party licenses
- Not established
- The latest listed release is dated April 23, 2021.
- The linked developer website returns 404; no accessible official manual found.
- Offline operation could not be verified.
Features
- Tested by running it
- Seen in the app
- The manual says yes
- Partly, with the reason shown
- Not supported
- Not established, which is not the same as no
Select a mark for its proof. A filled mark opens our screenshot, or the manual if the check left nothing to picture. A ring opens the manual.
Drawing structures
- Not establishedSingle, double and triple bonds
- Yes, according to the manual: Up/down wedges and wavy bonds; manual confirms wedge types. Opens the cited page.Wedge, hash and wavy bondsUp/down wedges and wavy bonds; manual confirms wedge types.apps.apple.com
- Not establishedDative, hydrogen and quadruple bonds
- Not establishedChoose double-bond side
- Yes, according to the manual: Vendor claim: saturated, aromatic, fused and spiro ring drawing. Opens the cited page.Ring toolsVendor claim: saturated, aromatic, fused and spiro ring drawing.apps.apple.com
- Not establishedChair and Haworth rings
- Yes, according to the manual: Vendor claim: press-and-drag gesture draws chains. Opens the cited page.Chain toolVendor claim: press-and-drag gesture draws chains.apps.apple.com
- Yes, according to the manual: Built-in protecting groups plus Groups and Template panel. Opens the cited page.Template libraryBuilt-in protecting groups plus Groups and Template panel.apps.apple.com
- Not establishedSave your own templates
- Yes, according to the manual: Vendor claim: named functional groups expand, including on MOL/SD export. Opens the cited page.Group abbreviationsVendor claim: named functional groups expand, including on MOL/SD export.apps.apple.com
- Not establishedCharges, isotopes and atom labels
- Not establishedRadicals and lone pairs
- Not establishedKeyboard drawing
- Not establishedLasso select and transforms
- Not establishedTilt drawings in perspective
Reactions and mechanisms
- Yes, according to the manual: Vendor claim: directional, retrosynthetic, resonance and equilibrium arrows. Opens the cited page.Reaction arrowsVendor claim: directional, retrosynthetic, resonance and equilibrium arrows.apps.apple.com
- Not establishedCurved mechanism arrows
- Yes, according to the manual: Vendor claim: exports reactions as RXN/RD files. Opens the cited page.Machine-readable reactionsVendor claim: exports reactions as RXN/RD files.apps.apple.com
- Not establishedAtom mapping
- Not establishedOrbitals and symbols
Figures and layout
- Not establishedRich text captions
- Not establishedShapes, brackets and curves
- Not establishedAlign and distribute
- Not establishedGroup and ungroup
- Not established2D structure cleanup
- Not establishedJournal drawing styles
- Not establishedReusable custom styles
- Yes, according to the manual: Vendor claim: annotation text color can be set. Opens the cited page.Color controlVendor claim: annotation text color can be set.apps.apple.com
- Not establishedColor highlighting
- Not establishedPage layout and multipage
- Not establishedImported pictures
- Not establishedTLC plates and tables
Chemistry intelligence
- Not establishedStructure checking
- Not establishedR/S and E/Z labels
- Yes, according to the manual: Vendor claim: formula, molecular weight, elemental composition and exact mass. Opens the cited page.Formula and massVendor claim: formula, molecular weight, elemental composition and exact mass.apps.apple.com
- Not establishedProperty estimates
- Not establishedName to structure
- Not establishedStructure to name
- Not establishedNMR prediction
- Yes, according to the manual: Vendor claim: R-groups supported, including MOL import. Opens the cited page.R-groups and query structuresVendor claim: R-groups supported, including MOL import.apps.apple.com
- Not establishedPolymers and repeat units
- Not establishedPeptides and nucleic acids
- Not establishedImage to structure
- Not establishedOnline structure lookup
- Not established3D model view
- Not establishedCrystal structures
Files and exchange
- Not establishedCDXML import and export
- Not establishedCDX import and export
- Yes, according to the manual: Vendor claim: MOL/SD import and export. Opens the cited page.MOL and SDFVendor claim: MOL/SD import and export.apps.apple.com
- Not establishedSMILES
- Not establishedInChI
- Yes, according to the manual: Vendor claim: RXN/RD export. Opens the cited page.RXN filesVendor claim: RXN/RD export.apps.apple.com
- Not establishedSVG export
- Yes, according to the manual: Vendor claim: scalable vector PDF export. Opens the cited page.PDF exportVendor claim: scalable vector PDF export.apps.apple.com
- Not establishedHigh-resolution PNG
- Not establishedPaste to and from ChemDraw
- Not establishedEditable in Word or PowerPoint
- Not establishedWindows Office OLE
APIs and automation
- Not establishedPython API
- Not establishedJavaScript or TypeScript API
- Not establishedCommand-line tool
- Not establishedAI agent control
- Not establishedBuilt-in AI assistant
Embedding and extension
- Not establishedPlugins
- Not established: Developer link returns 404; embedding mechanism unconfirmed.Embed in your own appDeveloper link returns 404; embedding mechanism unconfirmed.apps.apple.com