Comparison

ReactionFlash vs Chemical Structures Quiz

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

Chemical Structures Quiz

Test your knowledge of organic and biochemical compounds with multiple-choice quizzes. Learn systematic and common names for hydrocarbons, functional groups, and biomolecules. Ideal for high school students studying chemistry.

Highlights
  • Multiple-choice quizzes
  • Learn systematic and common names
  • Covers hydrocarbons, functional groups, biomolecules
  • Offline functionality
  • No advertisements
Features
Read full description

Quickly learn the chemical structures of the most important organic and biochemical compounds, taught in secondary education (high school), by taking the multiple choice quizzes. Systematic name, trivial name (common name), or both are given. Hydrocarbons, functional groups, biomolecules, sugars, nucleobases, vitamins, amino acids. Similar to my other (free) apps. Works offline. No ads.

Screenshots

ReactionFlash4 screens
Chemical Structures Quiz4 screens

Verdict

The call

The clearest difference is price: ReactionFlash at Free against Chemical Structures Quiz's $3.99. ReactionFlash also leads on review sentiment (81% vs 50%). Chemical Structures Quiz's advantage is iOS requirement (11.0 vs 14.0). On update cadence, ads, in-app purchases 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

ReactionFlash is free to download; Chemical Structures Quiz costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

ReactionFlash ships an update every 4 months, Chemical Structures Quiz every 2 months. The most recent releases landed on September 21, 2026 and September 7, 2026 respectively.

Scorecard4 real differences · 6 level
ReactionFlash versus Chemical Structures Quiz: the parameters behind the verdict, then further details
ParameterReactionFlashChemical Structures Quiz
PriceFree — better$3.99
Rating4.8 (41 ratings) — better—
Positive reviews80.6% of reviews — better50.0% of reviews
Number of ratings41 — better—
Update frequencyEvery 4 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS14.011.0 — better
Further details — not scored
Size37 MB12 MB
Age rating4+4+
DeveloperElsevier LimitedMarijn Dillen

Customer experience

ReactionFlash

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

Chemical Structures Quiz

Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

ReactionFlash

No in-app purchases

None

Chemical Structures Quiz

No in-app purchases

Questions

Is ReactionFlash free?
ReactionFlash is free to download, with no in-app purchases.
Is Chemical Structures Quiz free?
Chemical Structures Quiz costs $3.99, with no in-app purchases.
Do ReactionFlash or Chemical Structures Quiz have ads?
Neither ReactionFlash nor Chemical Structures Quiz shows ads.
Which is updated more often, ReactionFlash or Chemical Structures Quiz?
ReactionFlash ships an update every 4 months, and Chemical Structures Quiz every 2 months. Most recently, ReactionFlash was updated on September 21, 2026 and Chemical Structures Quiz on September 7, 2026.

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