Best Reaction Flash Apps & Games

221+ iOS apps & games curated and reviewed

3.8 avg rating
17 free apps & games
Updated October 2026

ReactionFlash is the household name in reaction flash, but it's far from the only option. We track 221+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

Compare top Reaction Flash Apps & Games (October 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1ReactionFlashReactionFlashFree4.8★ (41)NoNoJul 2026
2Organic Reaction CardsOrganic Reaction CardsFree4.8★ (30)NoYesOct 2026
3Organic ReactionsOrganic ReactionsFree4.7★ (162)NoYesSep 2026
4Chemistry By Design: Target Synthesis DatabaseChemistry By Design: Target Synthesis DatabaseFree5.0★ (14)NoNoOct 2026
5Dot Reflex — Reaction TestDot Reflex — Reaction TestFree—YesNoSep 2026
6Reaction Speed Test ProReaction Speed Test Pro$0.99—NoNoSep 2026
7ReactionTimeCheckerReactionTimeCheckerFree1.0★ (1)YesNoMay 2026
8Reaction Speed Test - Prove itReaction Speed Test - Prove itFree—YesNoAug 2026

Top Picks for Reaction Flash

ReactionFlash#1

ReactionFlash by Elsevier Limited

Named Chemical Reactions
Editor's Choice
📚 Education
4.8(41 ratings)
Free
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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.

Organic Reaction Cards#2

Organic Reaction Cards by Aaron M. Hartel

Customizable Flash Cards
Strong Contender
📚 Education
4.8(30 ratings)
FreeIn-App Purchases
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Master organic chemistry reactions with customizable flashcards. Learn reactants, reagents, products, and named reactions by hiding and revealing components. Tailor decks to your specific course needs.

4.7(162 ratings)
FreeIn-App Purchases
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Access key functional group reactions and their mechanisms in organic chemistry. Quickly find links between reactants and products, including synthesis and protection reactions. Some advanced features and reaction lists require an additional purchase.

More Reaction Flash apps to explore

FAQ about Reaction Flash

What are the best reaction flash apps & games for iPhone?
ReactionFlash tops our reaction flash apps & games ranking as of October 2026, with a 4.8-star average from 41 App Store ratings, and it's free to download.
Yes — 17 of the top reaction flash apps & games we rank are free to download, including ReactionFlash and Organic Reaction Cards.
ReactionFlash has no ads and has no in-app purchases, according to its App Store listing as of October 2026.
We track 221+ reaction flash apps & games on the iOS App Store as of October 2026, ranked by rating, recency, and analysis of real user reviews.