Organic chemistry is tough.

From the sheer volume of content, to problems requiring creative thinking and mental gymnastics to visualize complex 3D molecules, no wonder organic chemistry is universally known as a “weed out” class. Many students who struggle with organic chemistry try to memorize facts, but that doesn’t work. Mol is a modern learning experience that takes a fun, interactive approach to understanding fundamental concepts.

Engaging exercises integrate effective learning strategies into a gamified framework that keeps you progressing toward mastery. Immediate feedback helps you see what you got wrong, and if you get stuck, useful chemistry information is just a click away. Since you can’t improve what you don’t measure, check out your session statistics to see how you’re progressing over time.

Beautiful molecular visualizations are available in both 2D and 3D. Help bridge your understanding of molecule structure by switching between representations on the fly. It’s like having a bulky model kit in your pocket! All molecular data is sourced from the National Institutes of Health’s online PubChem database and vetted by trained chemists so you have an authentic and effective experience.

Mol is currently focused on stereochemistry concepts such as chiral centers, R or S assignment, enantiomers, and diastereomers. Additional exercises and tools are under active development and will be available at no additional cost. If you’d like to see what we’re currently doing or have planned for the future of Mol, check out our roadmap:

Want to stay connected with us? Join our user community to request features, submit ideas for improvements, report bugs, and just talk about chemistry:

Mol Chemistry is made possible by a competitive Small Business Innovation Research grant from the National Institutes of Health's National Institute of General Medical Sciences.

What's New

Version 1.2.2

This 1.2.2 release focuses on fixes and improvements for a better learning experience.

• Solid and dashed wedges denoting stereochemistry are now shown in the 2D view
• Assigning priorities in R vs S exercise is now a smoother experience
• Added a clockwise/counterclockwise drawing visualization for the determination stage in the R vs S exercise
• R vs S exercise now supports molecules with multiple chiral centers on higher levels
• Added a screen vignette to R vs S to improve clarity on large molecules
• Stereoisomer exercise now starts with smaller molecules

Bug Fixes
• Fixed a bug in the R vs S exercise where chemistry information was registered incorrectly
• Fixed a bug where the 4th priority group in R vs S exercise would continue rotating after that staged was passed
• Fixed a bug that caused molecules to repeat often
• Fixed the issue with the atom details display not working with the iPhone X notch side

Known Issues
• User interface (UI): Some UI elements become incorrectly positioned on devices with screens that do not use a 16:9 aspect ratio

Ratings and Reviews

StudyViz ,

Cool game! Helpful!

I really like the user interface of this. And I think it's really helpful to practice identifying chirality centers, but I'd like it if there were more types of exercises (like identifying R & S enatiomers, etc) especially after paying over $4 for it. Thanks and great study game again!

Developer Response ,

Hey StudyViz, thanks for checking out Mol and leaving some feedback! Keep an eye out for an update coming soon that will add some exercise content and other improvements we think you're going to enjoy.


Substrate Games, LLC
141.6 MB
Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2018 Substrate Games, LLC


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