Comparison

Khan Academy vs Tap OChem

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

Head to head
About

Khan Academy

Access a vast library of free educational content, including interactive exercises, videos, and articles. Master subjects from math and science to humanities and finance at your own pace, with offline access and personalized learning paths.

Highlights
  • Thousands of interactive exercises, videos, and articles
  • Study math, science, economics, finance, grammar, history, and more
  • Practice exercises with instant feedback and hints
  • Offline content access
  • Personalized learning mastery system
  • Syncs progress with website account
Currently charting
Read full description

You can learn anything. For free. Spend an afternoon brushing up on statistics. Discover how the Krebs cycle works. Get a head start on next semester's geometry. Prepare for upcoming exams. Or, if you're feeling particularly adventurous, learn how fire-stick farming changes the landscape of Australia. Whether you're a student, teacher, homeschooler, principal, adult returning to the classroom after 20 years, or a friendly alien trying to get a leg up in earthly biology — Khan Academy's personalized learning library is available to you, for free. - Learn anything, for free: Thousands of interactive exercises, videos, and articles at your fingertips. Study math, science, economics, finance, grammar, history, government, politics, and much, much more. - Sharpen your skills: Practice exercises, quizzes, and tests with instant feedback and step-by-step hints. Follow along with what you're learning in school, or practice at your own pace. - Keep learning when you're offline: Bookmark and download your favorite content to watch videos without an internet connection. - Pick up where you left off: Tailored to your current learning level, our mastery system gives instant feedback and recommendations on exactly which skills and videos to try next. And, if you choose to create a free account, your learning syncs with http://khanacademy.org, so your progress is always up-to-date across all your devices. Learn using expert-created videos, interactive exercises, and in-depth articles in math (arithmetic, pre-algebra, algebra, geometry, trigonometry, statistics, calculus, differential equations, linear algebra), science (biology, chemistry, physics), economics (microeconomics, macroeconomics, finance and capital markets), humanities (art history, civics, finance, US history, US government and politics, world history), and more (including computer science principles)! Already familiar with the Khan Academy website? Not all functionality is available in this app. Community discussions, computer programming content, test prep, parent tools, teacher tools, and district tools should all be accessed directly at http://khanacademy.org. Khan Academy is a 501(c)(3) nonprofit organization, with the mission of providing a free, world-class education for anyone, anywhere.

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.

Screenshots

Khan Academy4 screens
Tap OChem4 screens

Verdict

The call

The clearest difference is price: Khan Academy at Free against Tap OChem's $4.99. Khan Academy also leads on ratings volume (113K vs 39) and chart position (#62 vs unranked). Tap OChem's advantage is review sentiment (92% vs 74%) and iOS requirement (13.2 vs 15.0). On rating, update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

Khan Academy is free to download; Tap OChem costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.6 for Khan Academy against 4.7 for Tap OChem. That said, the two scores are not equally well evidenced: Khan Academy has 113K ratings behind it against 39, so its average is the more settled of the two. Written reviews are what separate them: 74% of Khan Academy's written reviews are positive against 92% of Tap OChem's.

UpkeepUpdate frequency

Khan Academy ships an update every 6 weeks, Tap OChem every 3 months. The most recent releases landed on October 29, 2026 and October 23, 2026 respectively.

Scorecard6 real differences · 5 level
Khan Academy versus Tap OChem: the parameters behind the verdict, then further details
ParameterKhan AcademyTap OChem
PriceFree — better$4.99
Rating4.6 (113K ratings)4.7 (39 ratings) — better
Positive reviews74.2% of reviews91.7% of reviews — better
Number of ratings113K — better39
Update frequencyEvery 6 weeks — betterEvery 3 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
Best chart rank#62 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.013.2 — better
Further details — not scored
Size52 MB3.5 GB
Age rating12+4+
DeveloperKhan AcademyTap OChem, LLC

Customer experience

Khan Academy

All ratings112,672 ratings
Positive89.4%
Neutral2.6%
Negative8.0%
Written reviews1,631 reviews
Positive74.2%
Neutral6.6%
Negative19.2%

Tap OChem

All ratings39 ratings
Positive92.3%
Neutral0.0%
Negative7.7%
Written reviews12 reviews
Positive91.7%
Neutral0.0%
Negative8.3%

Bugs and requests

Khan Academy

Reported bugs

7 issues
  • Incorrect answers marked wrong
  • Keyboard issues
  • Glitches in interactive diagrams
  • Crashes and freezes
  • Content not loading
Show 2 more
  • Formatting issues in math
  • Bugged answer input

Requested features

10 requests
  • Add dark mode
  • Improve search and navigation
  • Add more content for higher grades
  • Allow redoing exercises
  • Improve writing/drawing tools
Show 5 more
  • Add split screen support
  • Improve progress tracking
  • Add more language options
  • Add more science and coding content
  • Improve SAT/test prep features

Tap OChem

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Khan Academy

No in-app purchases

None

Tap OChem

No in-app purchases

Questions

Is Khan Academy free?
Khan Academy is free to download, with no in-app purchases.
Is Tap OChem free?
Tap OChem costs $4.99, with no in-app purchases.
Which has better reviews, Khan Academy or Tap OChem?
Tap OChem is rated higher. Khan Academy averages 4.6 out of 5 from 113K ratings, while Tap OChem averages 4.7 from 39 ratings.
Do Khan Academy or Tap OChem have ads?
Neither Khan Academy nor Tap OChem shows ads.
Which is updated more often, Khan Academy or Tap OChem?
Khan Academy ships an update every 6 weeks, and Tap OChem every 3 months. Most recently, Khan Academy was updated on October 29, 2026 and Tap OChem on October 23, 2026.

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