Comparison

ReactionFlash vs MARVLS

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

MARVLS

Features
Read full description

Augmented Reality Models of topics in the first semester of a physics course including vectors, centroids, forces, impulse, momentum, projectiles, circular motion, torque, right-hand rule, and simple harmonic motion. You'll need a Merge Cube ( link included to download from the internet). Click on different button to navigate to different topics. Click on View in AR to view the model. Hold the Merge cube so that your camera can see it well. Move the cube around until you see the model. Click on the buttons to interact with the model. Click the back button to get back to the info screens or to the main screen.

Screenshots

ReactionFlash4 screens
MARVLS4 screens

Verdict

The call

The clearest difference is iOS requirement: ReactionFlash at 14.0 against MARVLS's 18.0. On price, update cadence, ads and in-app purchases 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.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on October 23, 2026 and October 3, 2026 respectively.

Scorecard1 real difference · 9 level
ReactionFlash versus MARVLS: the parameters behind the verdict, then further details
ParameterReactionFlashMARVLS
PriceFreeFree
Rating4.8 (42 ratings) — better—
Positive reviews80.6% of reviews—
Number of ratings42 — better—
Update frequencyEvery 4 monthsEvery 4 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPod — betteriPhone
Requires iOS14.0 — better18.0
Further details — not scored
Size37 MB242 MB
Age rating4+9+
DeveloperElsevier LimitedMichele McColgan

In-app purchases

None

ReactionFlash

No in-app purchases

None

MARVLS

No in-app purchases

Questions

Is ReactionFlash free?
ReactionFlash is free to download, with no in-app purchases.
Is MARVLS free?
MARVLS is free to download, with no in-app purchases.
Do ReactionFlash or MARVLS have ads?
Neither ReactionFlash nor MARVLS shows ads.
Which is updated more often, ReactionFlash or MARVLS?
ReactionFlash ships an update every 4 months, and MARVLS every 4 months. Most recently, ReactionFlash was updated on October 23, 2026 and MARVLS on October 3, 2026.

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