Comparison

ReactionFlash vs Functional Groups

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

Head to head
About

ReactionFlash

This app serves as a comprehensive flashcard-style learning tool for named chemical reactions. It provides detailed information on reaction mechanisms and examples from scientific literature, with a quiz mode to test user knowledge.

Highlights
  • Learn named chemical reactions
  • Understand reaction mechanisms
  • View literature examples
  • Quiz mode for knowledge testing
  • Flashcard interface
Features
Read full description

Want to refresh your memory on named chemical reactions before an exam or a group meeting? Get all the details with ReactionFlash(R) as a great way to learn named reactions, understand their mechanisms and view examples published in peer-reviewed literature. Designed and developed in consultation with Professor Dr. Erick M. Carreira of ETH Zürich, the app covers 1'266 named chemical reactions, by far the largest collection of Named Reactions. Professor Carreira has helped ensure that we have all the fundamental reactions that should be part of every chemist’s toolkit: from the best-known ones to the ones only Nobel Prize winners remember! The app is designed like a set of flash cards so it can be used as a learning tool as well as a reference. Each ‘card’ shows the reaction, its mechanism and examples from peer-reviewed, published literature. It also has a quiz mode that lets you test your knowledge. Linking into Reaxys enables you to find the most recent examples of each reaction, many with experimental details. Reaxys delivers experimental facts from the literature, enabling researchers to find the best synthetic routes and conditions. Find out more at https://www.elsevier.com/solutions/reaxys Download the app now and see if you know all the named reactions! Summary: - Learn named reactions - Review and understand mechanisms - Explore examples published in peer-reviewed literature - Take the ReactionFlash quiz and see how much you know If you need support, please contact us at reactionflash@elsevier.com. Reaxys and ReactionFlash are trade marks of Elsevier Limited, used under license.

About

Functional Groups

Master organic chemistry functional groups through an engaging and interactive learning experience. Ideal for students in introductory or advanced courses, MCAT prep, and A-Level chemistry, this app covers dozens of essential groups with practice modes and progress tracking.

Highlights
  • 25+ basic and advanced functional groups
  • 300+ organic compounds
  • Multiple practice modes
  • Customizable study groups
  • Personalized review
  • Reference table and definitions
  • Progress tracking with achievements
Features
Read full description

Ready to ace organic chemistry? Learn the functional groups you need to know - all in an engaging and interactive format. The app is ideal for introductory or advanced organic chemistry classes, MCAT prep, A-Level chemistry, and more. You’ll quickly become familiar with alcohols, esters, amides, amines, and dozens of other important functional groups. The app features: • 25+ basic and advanced functional groups • 300+ organic compounds • Multiple practice modes • Customize which groups to study • Personalized review • Reference table and definitions • Achievements to track your progress Along the way, you’ll learn interesting facts about pharmaceuticals, biomolecules, dangerous compounds, unique molecular structures, and more. With the Functional Groups app, learning organic chemistry is easy, straightforward, and, dare we say… fun? Give it a try and let us know what you think!

Screenshots

ReactionFlash4 screens
Functional Groups4 screens

Verdict

The call

The clearest difference is in-app purchases: ReactionFlash at none against Functional Groups's 1. Functional Groups's advantage is review sentiment (100% vs 81%). On price, rating, ratings volume and update cadence 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

Both are free to download. Functional Groups sells 1 one-off in-app purchase. ReactionFlash asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.8 for ReactionFlash against 4.9 for Functional Groups. Both are backed by a comparable volume of ratings — 41 and 21 respectively. Written reviews are what separate them: 81% of ReactionFlash's written reviews are positive against 100% of Functional Groups's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on September 21, 2026 and September 13, 2026 respectively.

Scorecard3 real differences · 7 level
ReactionFlash versus Functional Groups: the parameters behind the verdict, then further details
ParameterReactionFlashFunctional Groups
PriceFreeFree
Rating4.8 (41 ratings)4.9 (21 ratings) — better
Positive reviews80.6% of reviews100.0% of reviews — better
Number of ratings41 — better21
Update frequencyEvery 4 monthsEvery 4 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS14.0 — better15.0
Further details — not scored
Size37 MB17 MB
Age rating4+4+
DeveloperElsevier LimitedClarity Applications

Customer experience

ReactionFlash

All ratings41 ratings
Positive95.1%
Neutral2.4%
Negative2.4%
Written reviews31 reviews
Positive80.6%
Neutral6.5%
Negative12.9%

Functional Groups

All ratings21 ratings
Positive95.2%
Neutral4.8%
Negative0.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

ReactionFlash

No in-app purchases

1 purchases

Functional Groups

One-time1
  • Lifetime Access$9.99

Questions

Is ReactionFlash free?
ReactionFlash is free to download, with no in-app purchases.
Is Functional Groups free?
Functional Groups is free to download, with in-app purchases available.
Which has better reviews, ReactionFlash or Functional Groups?
Functional Groups is rated higher. ReactionFlash averages 4.8 out of 5 from 41 ratings, while Functional Groups averages 4.9 from 21 ratings.
Do ReactionFlash or Functional Groups have ads?
Neither ReactionFlash nor Functional Groups shows ads.
Which is updated more often, ReactionFlash or Functional Groups?
ReactionFlash ships an update every 4 months, and Functional Groups every 4 months. Most recently, ReactionFlash was updated on September 21, 2026 and Functional Groups on September 13, 2026.

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