Comparison

Tap OChem vs Diffusion and osmosis

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Tap OChem

Visualize complex organic chemistry reactions and concepts with animated explanations. This app covers a wide range of undergraduate organic chemistry topics, aiding in exam preparation and understanding of molecular behavior.

Highlights
  • Animated organic chemistry reactions
  • Detailed concept explanations
  • Electron pushing diagrams
  • Full-color text descriptions
  • MCAT, PCAT, OAT, DAT prep
  • Regular content updates
Features
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"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!!!!!" 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 ten 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 DAT, this app will help! Designed by two award winning chemists with over 48 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 (20 animations), Elimination reactions (11 animations), Alkene Chemistry (15 animations), Free Radical Chemistry (4 animations), Alkyne Chemistry (7 animations), Epoxide chemistry (4 animations), Benzene chemistry (10 animations), Diene Chemistry (8 animations), Carbonyl Chemistry (8 animations), Major concepts (62+ animations), and Molecules in Motion (35+ animations). The Concepts section includes valence bond theory, molecular orbital theory, electrostatic potential maps, radical spin density maps, alkene stability, dienes and stability, conformational analysis of alkanes and cyclohexane, etc. We've just started adding information on intermolecular interactions and plan on more spectroscopic topics! One animation on dipole/dipole attraction was added. Two animations, one focused on the introduction to IR spectroscopy are included. We are developing and updating more animations for future updates! Each animation has an accompanying text that drills down to the main facts of each reaction or concept. These are in 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. We will continue to update the app with future releases. 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, 11, 12, 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, an appropriate adapter is needed like Lightning Digital AV Adapter (this is an HDMI adapter), or a USB C to HDMI adapter, or a Lightning to VGA Adapter. Please visit www.tapochem.com for further information.

About

Diffusion and osmosis

Features
Read full description

“Diffusion and Osmosis” is an interactive app for students to learn about Active transport, Diffusion and Osmosis, osmosis in plant cell, process of osmosis, diffusion biology in an easy and engrossing way by visualizing the colorful images. It is one of the best educational applications which is designed to help students learn Active transport, Diffusion and Osmosis, osmosis in plant cell, process of osmosis, diffusion biology in an innovative learning method. This app is for students in the age group of 11 - 15 years and is optimized for use in both phones and tablets. “Diffusion and Osmosis” app is students friendly and easy to use. Download the app NOW and assist your children to learn about Active transport, Diffusion and Osmosis, osmosis in plant cell, process of osmosis, diffusion biology easily. “Diffusion and Osmosis” app helps the students to learn everything about Diffusion and Osmosis, active transport in an innovative learning method. This app explains about Active transport, Diffusion and Osmosis, osmosis in plant cell, process of osmosis, diffusion biology in an easy and simple way with interesting Do it Yourself activities. The interactive approach of the app makes it a more immersive experience for the students. The app is based on Diffusion and Osmosis, active transport. Students can explore and practice the interactive activities and view the colorful images for better understanding. The colorful images and interactive activities will help the students to learn about Active transport, Diffusion and Osmosis, osmosis in plant cell, process of osmosis, diffusion biology in an easy and engrossing way. Features: Learn - Learn about Diffusion and Osmosis, active transport. Practice - Get an opportunity to try for yourself the interactive activities. Quiz - Take a challenging quiz section to assess your learning This educational application helps students understand and learn about Active transport, Diffusion and Osmosis, osmosis in plant cell, process of osmosis, diffusion biology in an easy and engrossing way. Download “Diffusion and Osmosis” app and other educational apps published by Ajax Media Tech. With the interactive education model, students will be able to absorb and learn the fundamentals and basics with minimal efforts and maximum retention.

Screenshots

Tap OChem4 screens
Diffusion and osmosis4 screens

Verdict

The call

The clearest difference is update cadence: Tap OChem at every 3 months against Diffusion and osmosis's every 30 months. Diffusion and osmosis's advantage is price ($0.99 vs $4.99). 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

Tap OChem costs $4.99 and Diffusion and osmosis $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Tap OChem ships an update every 3 months, Diffusion and osmosis every 30 months. The most recent releases landed on October 10, 2026 and October 12, 2026 respectively.

Scorecard2 real differences · 8 level
Tap OChem versus Diffusion and osmosis: the parameters behind the verdict, then further details
ParameterTap OChemDiffusion and osmosis
Price$4.99$0.99 — better
Rating4.7 (39 ratings) — better—
Positive reviews91.7% of reviews—
Number of ratings39 — better—
Update frequencyEvery 3 months — betterEvery 30 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.212.0 — better
Further details — not scored
Size3.5 GB40 MB
Age rating4+4+
DeveloperTap OChem, LLCwww.ajaxmediatech.com

In-app purchases

None

Tap OChem

No in-app purchases

None

Diffusion and osmosis

No in-app purchases

Questions

Is Tap OChem free?
Tap OChem costs $4.99, with no in-app purchases.
Is Diffusion and osmosis free?
Diffusion and osmosis costs $0.99, with no in-app purchases.
Do Tap OChem or Diffusion and osmosis have ads?
Neither Tap OChem nor Diffusion and osmosis shows ads.
Which is updated more often, Tap OChem or Diffusion and osmosis?
Tap OChem ships an update every 3 months, and Diffusion and osmosis every 30 months. Most recently, Tap OChem was updated on October 10, 2026 and Diffusion and osmosis on October 12, 2026.

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