ReactionFlash vs Molecular Formula Generator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Learn named chemical reactions
- Understand reaction mechanisms
- View literature examples
- Quiz mode for knowledge testing
- Flashcard interface
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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.
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.
- Generate molecular formulas by m/z value
- Specify mass accuracy
- Define elemental composition
- Include double bond equivalents
- Share formula lists via email
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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
Verdict
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
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.
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.
| Parameter | ReactionFlash | Molecular Formula Generator |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (41 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 80.6% of reviews | — |
| Number of ratings | 41 — better | 3 |
| Update frequency | Every 4 months — better | Every 16 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 14.0 | 7.0 — better |
| Further details — not scored | ||
| Size | 37 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Elsevier Limited | Kirill Blinov |
Customer experience
ReactionFlash
Molecular Formula Generator
In-app purchases
ReactionFlash
No in-app purchases
Molecular Formula Generator
No in-app purchases
Questions
Is ReactionFlash free?
Is Molecular Formula Generator free?
Which has better reviews, ReactionFlash or Molecular Formula Generator?
Do ReactionFlash or Molecular Formula Generator have ads?
Which is updated more often, ReactionFlash or Molecular Formula Generator?
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