ReactionFlash vs Perse Visualizer
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.
Perse Visualizer
Visualize protein structures on your mobile device. Search the protein data bank by name or ID and display them in various styles like cartoon or ball and stick. Ideal for biology students and researchers.
- Protein visualization
- Search by name or ID
- Multiple display styles
- Access to protein data bank
- Educational tool
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An easy to use mobile protein visualizer. Search for any protein from the RCSB protein data bank by name or ID. Perse can visualize proteins in cartoon, line, sphere and ball and stick style. Find this app helpful in the biology classroom or lab!
Screenshots
Verdict
The clearest difference is ads: ReactionFlash at none against Perse Visualizer's shown. ReactionFlash also leads on review sentiment (81% vs 50%) and monetization model (free vs ad-supported). Perse Visualizer's advantage is rating (5.0 vs 4.8) and update cadence (every 2 months vs every 4 months). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Perse Visualizer 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 7, so its average is the more settled of the two. Written reviews complicate that: 81% of ReactionFlash's written reviews are positive against 50% of Perse Visualizer's, so the app with the better star average is not the one people write more warmly about.
ReactionFlash ships an update every 4 months, Perse Visualizer every 2 months. The most recent releases landed on September 21, 2026 and September 9, 2026 respectively.
| Parameter | ReactionFlash | Perse Visualizer |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (41 ratings) | 5.0 (7 ratings) — better |
| Positive reviews | 80.6% of reviews — better | 50.0% of reviews |
| Number of ratings | 41 — better | 7 |
| Update frequency | Every 4 months | Every 2 months — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 14.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 37 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | Elsevier Limited | Dylan Riffle |
Customer experience
ReactionFlash
Perse Visualizer
In-app purchases
ReactionFlash
No in-app purchases
Perse Visualizer
No in-app purchases
Questions
Is ReactionFlash free?
Is Perse Visualizer free?
Which has better reviews, ReactionFlash or Perse Visualizer?
Do ReactionFlash or Perse Visualizer have ads?
Which is updated more often, ReactionFlash or Perse Visualizer?
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