Comparison

ReactionFlash vs Isotope Browser

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

Isotope Browser

Access comprehensive nuclear data for over 4,000 nuclides and isomers. Explore interactive charts, filter by various criteria, and view detailed information for each nuclide. Data is sourced from reliable resources and available offline.

Highlights
  • Properties of over 4,000 nuclides and isomers
  • Interactive Chart of Nuclides
  • Periodic Table of Elements
  • Filter by half-life, decay mode, radiation type, and energy
  • Detailed nuclide information with web links
  • Offline access to embedded database
Features
Read full description

Provided by the Nuclear Data Section of the International Atomic Energy Agency, the app gives properties of more than 4 000 nuclides and isomers. A Chart of Nuclides, with zooming and tapping enabled, and a Periodic Table of Elements are included to allow easy selection and navigation. Filter criteria on half-life, decay mode, radiation type and energy can be selected. Summary data are presented in a scrolling list, with a details page for each nuclide containing web links to the data sources and further information such as level and decay schema. The filtered nuclides can be visualised on the Chart of Nuclides. Data are taken from the most recent and reliable sources, and optimal search-and-retrieve performance is achieved with an embedded database, meaning that no network connection is required.

Screenshots

ReactionFlash4 screens
Isotope Browser4 screens

Verdict

The call

The clearest difference is update cadence: Isotope Browser at every 6 weeks against ReactionFlash's every 4 months. Isotope Browser also leads on iOS requirement (11.0 vs 14.0). On price, rating, review sentiment and ratings volume 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

On the App Store both sit at effectively the same score — 4.8 for ReactionFlash against 4.8 for Isotope Browser. Both are backed by a comparable volume of ratings — 41 and 27 respectively. Written reviews are what separate them: 81% of ReactionFlash's written reviews are positive against 83% of Isotope Browser's.

UpkeepUpdate frequency

ReactionFlash ships an update every 4 months, Isotope Browser every 6 weeks. Both last shipped on September 21, 2026.

Scorecard2 real differences · 8 level
ReactionFlash versus Isotope Browser: the parameters behind the verdict, then further details
ParameterReactionFlashIsotope Browser
PriceFreeFree
Rating4.8 (41 ratings)4.8 (27 ratings)
Positive reviews80.6% of reviews82.6% of reviews — better
Number of ratings41 — better27
Update frequencyEvery 4 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS14.011.0 — better
Further details — not scored
Size37 MB8 MB
Age rating4+4+
DeveloperElsevier LimitedIAEA

Customer experience

ReactionFlash

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

Isotope Browser

All ratings27 ratings
Positive92.6%
Neutral3.7%
Negative3.7%
Written reviews23 reviews
Positive82.6%
Neutral13.0%
Negative4.3%

In-app purchases

None

ReactionFlash

No in-app purchases

None

Isotope Browser

No in-app purchases

Questions

Is ReactionFlash free?
ReactionFlash is free to download, with no in-app purchases.
Is Isotope Browser free?
Isotope Browser is free to download, with no in-app purchases.
Which has better reviews, ReactionFlash or Isotope Browser?
ReactionFlash and Isotope Browser are both rated 4.8 out of 5 on the App Store, from 41 and 27 ratings respectively.
Do ReactionFlash or Isotope Browser have ads?
Neither ReactionFlash nor Isotope Browser shows ads.
Which is updated more often, ReactionFlash or Isotope Browser?
ReactionFlash ships an update every 4 months, and Isotope Browser every 6 weeks. Most recently, ReactionFlash was updated on September 21, 2026 and Isotope Browser on September 21, 2026.

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