Comparison

ReactionFlash vs Molecular Formula Generator

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

Molecular Formula Generator

This app generates a comprehensive list of molecular formulas based on mass spectrometry data and elemental composition. Users can specify m/z values, mass accuracy, and potential elements to find matching formulas. The generated lists can be shared via email.

Highlights
  • Generate molecular formulas by m/z value
  • Specify mass accuracy
  • Define elemental composition
  • Include double bond equivalents
  • Share formula lists via email
Features
Read full description

Generates full list of molecular formulae based on molecular mass (m/z value) and elemental composition. - Specify m/z value, mass accuracy, possible element composition and double bonds equivalent; - Generate complete list of molecular formulae (only first 1000 displayed); - Share list of molecular formulae via email;

Screenshots

ReactionFlash4 screens
Molecular Formula Generator4 screens

Verdict

The call

The clearest difference is update cadence: ReactionFlash at every 4 months against Molecular Formula Generator's every 16 months. ReactionFlash also leads on ratings volume (41 vs 3). Molecular Formula Generator's advantage is rating (5.0 vs 4.8) and iOS requirement (7.0 vs 14.0). On price, ads, in-app purchases and monetization model 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

Molecular Formula Generator holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: ReactionFlash has 41 ratings behind it against 3, so its average is the more settled of the two.

UpkeepUpdate frequency

ReactionFlash ships an update every 4 months, Molecular Formula Generator every 16 months. The most recent releases landed on September 21, 2026 and June 6, 2026 respectively.

Scorecard4 real differences · 6 level
ReactionFlash versus Molecular Formula Generator: the parameters behind the verdict, then further details
ParameterReactionFlashMolecular Formula Generator
PriceFreeFree
Rating4.8 (41 ratings)5.0 (3 ratings) — better
Positive reviews80.6% of reviews—
Number of ratings41 — better3
Update frequencyEvery 4 months — betterEvery 16 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPod
Requires iOS14.07.0 — better
Further details — not scored
Size37 MB3 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%

Molecular Formula Generator

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

ReactionFlash

No in-app purchases

None

Molecular Formula Generator

No in-app purchases

Questions

Is ReactionFlash free?
ReactionFlash is free to download, with no in-app purchases.
Is Molecular Formula Generator free?
Molecular Formula Generator is free to download, with no in-app purchases.
Which has better reviews, ReactionFlash or Molecular Formula Generator?
Molecular Formula Generator is rated higher. ReactionFlash averages 4.8 out of 5 from 41 ratings, while Molecular Formula Generator averages 5.0 from 3 ratings.
Do ReactionFlash or Molecular Formula Generator have ads?
Neither ReactionFlash nor Molecular Formula Generator shows ads.
Which is updated more often, ReactionFlash or Molecular Formula Generator?
ReactionFlash ships an update every 4 months, and Molecular Formula Generator every 16 months. Most recently, ReactionFlash was updated on September 21, 2026 and Molecular Formula Generator on June 6, 2026.

Other comparisons