Comparison

ReactionFlash vs WebMO Premium

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

WebMO Premium

This app allows users to build and visualize molecules in 3D, access chemical information from external databases, and interact with advanced computational chemistry programs. It's designed for students and faculty needing mobile access to molecular structures and data.

Highlights
  • 3D molecular editor
  • VSEPR and molecular mechanics optimization
  • Orbital and symmetry visualization
  • Chemical data lookup
  • Computational chemistry program integration
  • Spectra visualization
Features
Read full description

WebMO Premium is equivalent in functionality to the free 'WebMO' app in conjunction with the 'WebMO Premium' in-app purchase. This paid version is provided for convienence for volume purchases. WebMO allows users to build and view molecules in 3-D, visualize orbitals and symmetry elements, lookup chemical information and properties from external databases, and access state-of-the-art computational chemistry programs. WebMO is recommended for students and faculty in high school, college, and graduate school who desire mobile access to molecular structures, information, and calculations. WebMO capabilities include: - Build molecules by drawing atoms and bonds in a 3-D molecular editor, or by speaking the name (e.g., “aspirin”) - Optimize structures using VSEPR theory or molecular mechanics - View Huckel molecular orbitals, electron density, and electrostatic potential - View molecular vibrations - View point group and symmetry elements of molecules - Lookup basic molecular information, including IUPAC and common names, stoichiometry, molar mass - Lookup chemical data from PubChem and ChemSpider - Lookup experimental and predicted molecular properties from external databases (NIST, Sigma-Aldrich) - Lookup IR, UV-VIS, NMR, and mass spectra from external databases (NIST, SDBS) - Capture high-resolution molecular images - Save and recall molecular structures locally - Export and import structures via email WebMO is also a front-end to WebMO servers (version 14 and higher): - Supports Gaussian, GAMESS, Molpro, MOPAC, NWChem, ORCA, PQS, PSI, Quantum Espresso, VASP, Q-Chem, and Tinker computational chemistry programs - Submit, monitor, and view calculations - View formatted tabular data extracted from output files, as well as raw output - Visualize geometry, partial charges, dipole moment, normal vibrational modes, molecular orbitals, and NMR/IR/UV-VIS spectra

Screenshots

ReactionFlash4 screens
WebMO Premium4 screens

Verdict

The call

The clearest difference is price: ReactionFlash at Free against WebMO Premium's $4.99. ReactionFlash also leads on rating (4.8 vs 4.0) and update cadence (every 4 months vs every 17 months). WebMO Premium's advantage is iOS requirement (12.0 vs 14.0). On 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; WebMO Premium costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

ReactionFlash holds the better App Store score, 4.8 against 4.0. That said, the two scores are not equally well evidenced: ReactionFlash has 41 ratings behind it against 4, 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 67% of WebMO Premium's.

UpkeepUpdate frequency

ReactionFlash ships an update every 4 months, WebMO Premium every 17 months. The most recent releases landed on September 29, 2026 and September 19, 2026 respectively.

Scorecard7 real differences · 3 level
ReactionFlash versus WebMO Premium: the parameters behind the verdict, then further details
ParameterReactionFlashWebMO Premium
PriceFree — better$4.99
Rating4.8 (41 ratings) — better4.0 (4 ratings)
Positive reviews80.6% of reviews — better66.7% of reviews
Number of ratings41 — better4
Update frequencyEvery 4 months — betterEvery 17 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS14.012.0 — better
Further details — not scored
Size37 MB12 MB
Age rating4+4+
DeveloperElsevier LimitedWebMO, LLC

Customer experience

ReactionFlash

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

WebMO Premium

All ratings4 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

In-app purchases

None

ReactionFlash

No in-app purchases

None

WebMO Premium

No in-app purchases

Questions

Is ReactionFlash free?
ReactionFlash is free to download, with no in-app purchases.
Is WebMO Premium free?
WebMO Premium costs $4.99, with no in-app purchases.
Which has better reviews, ReactionFlash or WebMO Premium?
ReactionFlash is rated higher. ReactionFlash averages 4.8 out of 5 from 41 ratings, while WebMO Premium averages 4.0 from 4 ratings.
Do ReactionFlash or WebMO Premium have ads?
Neither ReactionFlash nor WebMO Premium shows ads.
Which is updated more often, ReactionFlash or WebMO Premium?
ReactionFlash ships an update every 4 months, and WebMO Premium every 17 months. Most recently, ReactionFlash was updated on September 29, 2026 and WebMO Premium on September 19, 2026.

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