Comparison

ReactionFlash vs Organic Reactions

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

Organic Reactions

Access key functional group reactions and their mechanisms in organic chemistry. Quickly find links between reactants and products, including synthesis and protection reactions. Some advanced features and reaction lists require an additional purchase.

Highlights
  • Functional group reactions
  • Reaction mechanisms
  • Reactant-product links
  • Synthesis reactions
  • Protection reactions
Features
Read full description

This app allows people working in organic chemistry for a quick access to the main functional group reactions and their mechanisms. The application is organized to provide a direct link between a reactant and its corresponding product, as well as the synthesis and protection reactions. To enable a regular updating and to support this work, some of the functions, and a list of reactions sorted by name requires an additional purchase. If you have any problem, do not hesitate to send me an email, by explaining the nature of your problem and your phone model.

Screenshots

ReactionFlash4 screens
Organic Reactions4 screens

Verdict

The call

The clearest difference is in-app purchases: ReactionFlash at none against Organic Reactions's 2. ReactionFlash also leads on update cadence (every 4 months vs every 10 months) and review sentiment (81% vs 68%). Organic Reactions's advantage is ratings volume (162 vs 41). On price, rating, ads and device support 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. Organic Reactions sells 2 one-off in-app purchases. 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 4.7 for Organic Reactions. Both are backed by a comparable volume of ratings — 41 and 162 respectively. Written reviews are what separate them: 81% of ReactionFlash's written reviews are positive against 68% of Organic Reactions's.

UpkeepUpdate frequency

ReactionFlash ships an update every 4 months, Organic Reactions every 10 months. The most recent releases landed on September 21, 2026 and September 20, 2026 respectively.

Scorecard6 real differences · 4 level
ReactionFlash versus Organic Reactions: the parameters behind the verdict, then further details
ParameterReactionFlashOrganic Reactions
PriceFreeFree
Rating4.8 (41 ratings) — better4.7 (162 ratings)
Positive reviews80.6% of reviews — better68.0% of reviews
Number of ratings41162 — better
Update frequencyEvery 4 months — betterEvery 10 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad
Requires iOS14.0 — better17.6
Further details — not scored
Size37 MB16 MB
Age rating4+4+
DeveloperElsevier LimitedFlorent Breton

Customer experience

ReactionFlash

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

Organic Reactions

All ratings162 ratings
Positive93.2%
Neutral3.7%
Negative3.1%
Written reviews25 reviews
Positive68.0%
Neutral20.0%
Negative12.0%

In-app purchases

None

ReactionFlash

No in-app purchases

2 purchases

Organic Reactions

One-time2
  • One month subscription$0.99
  • Full App$4.99

Questions

Is ReactionFlash free?
ReactionFlash is free to download, with no in-app purchases.
Is Organic Reactions free?
Organic Reactions is free to download, with in-app purchases available.
Which has better reviews, ReactionFlash or Organic Reactions?
ReactionFlash is rated higher. ReactionFlash averages 4.8 out of 5 from 41 ratings, while Organic Reactions averages 4.7 from 162 ratings.
Do ReactionFlash or Organic Reactions have ads?
Neither ReactionFlash nor Organic Reactions shows ads.
Which is updated more often, ReactionFlash or Organic Reactions?
ReactionFlash ships an update every 4 months, and Organic Reactions every 10 months. Most recently, ReactionFlash was updated on September 21, 2026 and Organic Reactions on September 20, 2026.

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