Comparison

ReactionFlash vs Chemical Engineering+

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 Engineering+

Test your knowledge of chemical engineering with a comprehensive quiz app. It offers thousands of questions across various topics, adaptive difficulty, and detailed explanations to enhance learning. Prepare for exams and boost your industry skills with this interactive tool.

Highlights
  • Extensive question bank
  • Topic-specific quizzes
  • Calculations & problem solving
  • Adaptive difficulty
  • Interactive learning with explanations
  • Offline play
  • Leaderboard competition
Features
Read full description

Master the World of Chemical Engineering with our Quiz App! Dive into the fascinating world of chemical engineering and test your knowledge with our app! Whether you’re a student, a professional, or just passionate about the field, this app is your ultimate companion to learn, revise, and challenge yourself. Key Features - Extensive Question Bank: Thousands of questions covering diverse topics like thermodynamics, reaction engineering, process control, energy systems, nanotechnology, and more. - Topic-Specific Quizzes: Focus on areas that matter most to you, from corrosion prevention to renewable energy systems. - Calculations & Problem Solving: Sharpen your skills with numerical problems and real-world scenarios. - Adaptive Difficulty: Questions designed for beginners to experts—perfect for everyone! - Interactive Learning: Detailed explanations for each answer to deepen your understanding. Boost Your Knowledge - Prepare for exams like FE, PE, or university assessments. - Enhance your practical skills for industry applications. - Stay updated with emerging trends like AI in process optimization and sustainable technologies. Why ChemEng Quiz Master? - Designed by experts in chemical engineering. - Intuitive interface with engaging visuals and progress tracking. - Play offline anytime, anywhere. How It Works 1. Choose a topic or let the app select one for you. 2. Answer multiple-choice questions and solve calculation-based problems. 3. Review your performance and learn from detailed feedback. Join a Global Community of Learners Challenge yourself, compete with friends, and climb the leaderboard to become a Chemical Engineering Master! Download ChemEng Quiz Master Today! Your journey to becoming a chemical engineering expert starts here. Unlock your potential, one question at a time. Start Quizzing. Start Learning. Start Winning. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://forwaelade.web.app/ChemicalEngineering/privacy-policy

Screenshots

ReactionFlash4 screens
Chemical Engineering+4 screens

Verdict

The call

The clearest difference is review sentiment: ReactionFlash at 81% against Chemical Engineering+'s 0%. ReactionFlash also leads on rating (4.8 vs 3.0) and in-app purchases (none vs 6). Chemical Engineering+'s advantage is update cadence (every 2 months vs every 4 months). On price, ads 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

Both are free to download. Chemical Engineering+ sells 6 in-app purchases, starting at $9.99 per month. ReactionFlash asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

ReactionFlash holds the better App Store score, 4.8 against 3.0. That said, the two scores are not equally well evidenced: ReactionFlash has 42 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 81% of ReactionFlash's written reviews are positive against 0% of Chemical Engineering+'s.

UpkeepUpdate frequency

ReactionFlash ships an update every 4 months, Chemical Engineering+ every 2 months. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

Scorecard7 real differences · 3 level
ReactionFlash versus Chemical Engineering+: the parameters behind the verdict, then further details
ParameterReactionFlashChemical Engineering+
PriceFreeFree
Rating4.8 (42 ratings) — better3.0 (2 ratings)
Positive reviews80.6% of reviews — better0.0% of reviews
Number of ratings42 — better2
Update frequencyEvery 4 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad
Requires iOS14.0 — better17.0
Further details — not scored
Size37 MB18 MB
Age rating4+4+
DeveloperElsevier LimitedForwa Elade Wunde

Customer experience

ReactionFlash

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

Chemical Engineering+

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

ReactionFlash

No in-app purchases

6 purchases

Chemical Engineering+

Subscriptions3
  • 1 Month$9.991 Month
  • 6 Months$19.996 Months
  • 1 Year$29.991 Year
One-time3
  • 1500$0.99
  • 3500$1.99
  • 9000$3.99

Questions

Is ReactionFlash free?
ReactionFlash is free to download, with no in-app purchases.
Is Chemical Engineering+ free?
Chemical Engineering+ is free to download, with in-app purchases available.
Which has better reviews, ReactionFlash or Chemical Engineering+?
ReactionFlash is rated higher. ReactionFlash averages 4.8 out of 5 from 42 ratings, while Chemical Engineering+ averages 3.0 from 2 ratings.
Do ReactionFlash or Chemical Engineering+ have ads?
Neither ReactionFlash nor Chemical Engineering+ shows ads.
Which is updated more often, ReactionFlash or Chemical Engineering+?
ReactionFlash ships an update every 4 months, and Chemical Engineering+ every 2 months. Most recently, ReactionFlash was updated on November 1, 2026 and Chemical Engineering+ on October 30, 2026.

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