ReactionFlash vs Estonian
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.
Estonian
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Echo is a speaking-first way to learn Estonian. See a word or phrase in English, say it out loud in Estonian, and get instant feedback on your pronunciation. - Translate, Echo, and hands-free Trip practice modes - Really Learn Estonian: structured sessions with illustrations and spaced review - Text-to-speech so you always hear the correct pronunciation - Spaced repetition that brings words back right before you forget them - Progress tracking with streaks and mastery levels Practice the way humans have always learned languages: by speaking.
Screenshots
Verdict
The clearest difference is update cadence: Estonian at every 3 days against ReactionFlash's every 4 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
ReactionFlash ships an update every 4 months, Estonian every 3 days. The most recent releases landed on October 16, 2026 and September 17, 2026 respectively.
| Parameter | ReactionFlash | Estonian |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (41 ratings) — better | — |
| Positive reviews | 80.6% of reviews | — |
| Number of ratings | 41 — better | — |
| Update frequency | Every 4 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 14.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 37 MB | 174 MB |
| Age rating | 4+ | 4+ |
| Developer | Elsevier Limited | Mike Camara |
In-app purchases
ReactionFlash
No in-app purchases
Estonian
No in-app purchases
Questions
Is ReactionFlash free?
Is Estonian free?
Do ReactionFlash or Estonian have ads?
Which is updated more often, ReactionFlash or Estonian?
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