"Awesome" writes a reviewer!

More reviewers comments!
"I have used it for all of my exams so far and it is extraordinarily helpful."
"This is the best investment that you can make to visualize the reactions. There are a ton of them and they are AWESOME!!!!!"

With over 3 hours of video animations, Tap OChem puts organic reactions and concepts at your fingertips!

Quickly understand organic chemistry with over 130 animations of the most important concepts and reactions! Critical in prepping for the MCAT, PCAT, GRE, OAT, and DCAT.

Another reviewer writes “Covers all of the major topics and the videos help me visualize the details of the molecules and reactions”…“Could almost replace a whole textbook.”

While we never claim to cover an entire organic chemistry class, with content added in each update (major free updates each year since publishing four years ago!), Tap OChem is the app that delivers!

The reactions and concepts included are many from the one year sequence of undergraduate organic chemistry that is offered at all major colleges and universities. Students have told us that this app was essential in their preparation for the MCAT. Whether you are currently in the one year sequence of classes or reviewing for the MCAT, or PCAT, OAT, and DCAT, this app will help!

Designed by two award winning chemists with over 42 years of combined experience teaching at major universities, Tap OChem makes organic chemistry reaction come to life for each included reaction or concept. The following animations are currently included: Substitution reactions (14 animations), Elimination reactions (11 animations), Alkene Chemistry (14 animations), Free Radical Chemistry (3 animations), Alkyne Chemistry (6 animations), Epoxide chemistry (4 animations), Benzene chemistry (10 animations), Diene Chemistry (8 animations), Carbonyl Chemistry (8 animations), Key concepts (44 animations), and Molecules in Motion (34 animations). The Concepts section includes hybridization theory and conformational analysis of alkanes and cyclohexane. We are currently pushing up toward the maximum size for an iPhone/iPad app. While we plan to develop more animations in future updates we may need to submit these as a separate app!

Each animation has an accompanying text that drills down to the main facts of each reaction or concept. These are now FULL COLOR! They are short, handy, descriptions with important information regarding each reaction or concept. In the case of reaction animations, the concise scrollable text descriptions include electron pushing.

Tap OChem is native to both iPhones and iPads! In addition to the animations being very sharp on your iPhone and iPad, they are of excellent quality when projected (iPhone 4S and iPhone 6s, 6s Plus, 7, 7 Plus, 8, 8 Plus, X, and later, iPad 2 and later, using appropriate adapters) in a classroom.

For the iPhone 6s and later; and iPad Air 1 and 2 and later, a Lightning Digital AV Adapter (this is an HDMI adapter), or a Lightning to VGA Adapter is required to connect to a digital projector with HDMI and/or VGA inputs.

Please visit for further information.

What's New

Version 4.40

Five new animations were added to the 130+ animations retained from previous versions. In the Concepts-Intermediates section, two animations are now included: Hyperconjugation with the tert-Butyl Radical, and Hyperconjugation with the tert-Butyl Cation! These animations complement our animations on radical stability and carbocation stability. We have a new category in Concepts: Molecular Orbital Theory! In addition to the SN2 reactions with R-X that was updated in the 4.30 release, we've included three new animations in this catagory: 1) ethene, pi molecular orbitals, 2) allyl cation, pi molecular orbitals, and 3) 1,3-butadiene, pi molecular orbitals.

Ratings and Reviews



There are many things this app is lacking. Very, very useful for the information it does cover. And the 3D explanations w/ narration are great. But again, this app lacks other very important key subjects within Organic Chemistry. If it was more detailed, especially pertaining to college level curriculum, would be a fantastic app.

Most helpful organic chem app available


This app covers all the major topics, and the videos help me visualize the details of molecules and reactions. Incredibly high quality and FULL of info. I recommend to anyone taking organic or reviewing for the MCAT. Totally worth more than 99¢. Could almost replace a whole textbook.



This application is essential for anyone studying organic chemistry. All the reactions and concepts are organized to make everything easily accessible. Being able to watch the molecules move and transform helps tremendously in understanding the reactions. Thus, I highly recommend this app.


Tap OChem, LLC
3.8 GB
Requires iOS 11.0 or later. Compatible with iPhone 5s, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE, iPhone 7, iPhone 7 Plus, iPhone 8, iPhone 8 Plus, iPhone X, iPad Air, iPad Air Wi-Fi + Cellular, iPad mini 2, iPad mini 2 Wi-Fi + Cellular, iPad Air 2, iPad Air 2 Wi-Fi + Cellular, iPad mini 3, iPad mini 3 Wi-Fi + Cellular, iPad mini 4, iPad mini 4 Wi-Fi + Cellular, 12.9-inch iPad Pro, 12.9-inch iPad Pro Wi-Fi + Cellular, 9.7-inch iPad Pro, 9.7-inch iPad Pro Wi-Fi + Cellular, iPad (5th generation), iPad Wi-Fi + Cellular (5th generation), 12.9-inch iPad Pro (2nd generation), 12.9-inch iPad Pro Wi‑Fi + Cellular (2nd generation), 10.5-inch iPad Pro, 10.5-inch iPad Pro Wi‑Fi + Cellular, and iPod touch.
Age Rating
Rated 4+
© 2012 Tap OChem, LLC


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