Comparison

ReactionFlash vs ACS Safety First

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

ACS Safety First

Read full description

ACS Safety First is the official safety app of American Chemical Society. It is the only app that integrates with American Chemical Society's safety and security systems. ACS Security has worked to develop a unique app that provides students, faculty and staff with added safety on the American Chemical Society campus. The app will send you important safety alerts and provide instant access to campus safety resources. ACS Safety First features include: - Emergency Contacts: Contact the correct services for the American Chemical Society area in case of an emergency or a non-emergency concern. - Emergency Plans: Campus emergency documentation that can prepare you for disasters or emergencies. This can be accessed even when users aren’t connected to Wi-Fi or cellular data. - Emergency Maps: Locate rally points and areas in certain emergency situations. - Safety Toolbox: Enhance your safety with the set of tools provided in one convenient app. - WorkAlone: Use the app to "check in" with you periodically while working alone or during late hours. If you don't respond, the app will alert Campus Security. - Submit a Work-Order: Log in with your ACS credentials to send a request to facility services. - Book a Meeting Room: Reserve a conference room, see room availability, or make changes to an existing reservation using our scheduling tool. - Safety Notifications: Receive instant notifications and instructions from American Chemical Society safety when on-campus emergencies occur. Download today to ensure you’re prepared in the event of an emergency.

Screenshots

ReactionFlash4 screens
ACS Safety First4 screens

Verdict

The call

The clearest difference is update cadence: ReactionFlash at every 4 months against ACS Safety First's every 36 months. On price, 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

ReactionFlash ships an update every 4 months, ACS Safety First every 36 months. The most recent releases landed on October 23, 2026 and October 7, 2026 respectively.

Scorecard1 real difference · 9 level
ReactionFlash versus ACS Safety First: the parameters behind the verdict, then further details
ParameterReactionFlashACS Safety First
PriceFreeFree
Rating4.8 (42 ratings) — better—
Positive reviews80.6% of reviews—
Number of ratings42 — better—
Update frequencyEvery 4 months — betterEvery 36 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS14.0 — better15.6
Further details — not scored
Size37 MB30 MB
Age rating4+4+
DeveloperElsevier LimitedAmerican Chemical Society

In-app purchases

None

ReactionFlash

No in-app purchases

None

ACS Safety First

No in-app purchases

Questions

Is ReactionFlash free?
ReactionFlash is free to download, with no in-app purchases.
Is ACS Safety First free?
ACS Safety First is free to download, with no in-app purchases.
Do ReactionFlash or ACS Safety First have ads?
Neither ReactionFlash nor ACS Safety First shows ads.
Which is updated more often, ReactionFlash or ACS Safety First?
ReactionFlash ships an update every 4 months, and ACS Safety First every 36 months. Most recently, ReactionFlash was updated on October 23, 2026 and ACS Safety First on October 7, 2026.

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