Comparison

ReactionFlash vs Molecule

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

Molecule

This app allows users to create and share chemical structures with ease. It calculates molecular formula, weight, and elemental composition in real-time as you draw. Ideal for students and researchers needing a simple tool for molecular visualization.

Highlights
  • Draw chemical structures
  • Share structures
  • Calculate MF, MW, Monoisotopic Mass
  • Calculate Elemental Composition
  • Interactive calculations
  • Modern interface
Features
Read full description

Simple modern chemical structure editor. Allow to draw and share chemical structure. MF, MW, Monoisotopic Mass and Elemental Composition calculated interactively during drawing.

Screenshots

ReactionFlash4 screens
Molecule4 screens

Verdict

The call

The clearest difference is rating: ReactionFlash at 4.8 against Molecule's 4.0. ReactionFlash also leads on ratings volume (41 vs 10). Molecule's advantage is iOS requirement (7.0 vs 14.0). On price, review sentiment, update cadence and ads 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

ReactionFlash holds the better App Store score, 4.8 against 4.0. Both are backed by a comparable volume of ratings — 41 and 10 respectively. Written reviews point the same way: 81% of ReactionFlash's written reviews are positive against 76% of Molecule's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on September 21, 2026 and August 30, 2026 respectively.

Scorecard3 real differences · 7 level
ReactionFlash versus Molecule: the parameters behind the verdict, then further details
ParameterReactionFlashMolecule
PriceFreeFree
Rating4.8 (41 ratings) — better4.0 (10 ratings)
Positive reviews80.6% of reviews — better76.2% of reviews
Number of ratings41 — better10
Update frequencyEvery 4 monthsEvery 4 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS14.07.0 — better
Further details — not scored
Size37 MB9 MB
Age rating4+4+
DeveloperElsevier LimitedKirill Blinov

Customer experience

ReactionFlash

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

Molecule

All ratings10 ratings
Positive70.0%
Neutral10.0%
Negative20.0%
Written reviews21 reviews
Positive76.2%
Neutral9.5%
Negative14.3%

In-app purchases

None

ReactionFlash

No in-app purchases

None

Molecule

No in-app purchases

Questions

Is ReactionFlash free?
ReactionFlash is free to download, with no in-app purchases.
Is Molecule free?
Molecule is free to download, with no in-app purchases.
Which has better reviews, ReactionFlash or Molecule?
ReactionFlash is rated higher. ReactionFlash averages 4.8 out of 5 from 41 ratings, while Molecule averages 4.0 from 10 ratings.
Do ReactionFlash or Molecule have ads?
Neither ReactionFlash nor Molecule shows ads.
Which is updated more often, ReactionFlash or Molecule?
ReactionFlash ships an update every 4 months, and Molecule every 4 months. Most recently, ReactionFlash was updated on September 21, 2026 and Molecule on August 30, 2026.

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