# ReactionFlash vs SynStrategy

The clearest difference is review sentiment: SynStrategy at 100% against ReactionFlash's 81%. SynStrategy also leads on rating (5.0 vs 4.8). ReactionFlash's advantage is ratings volume (41 vs 9) and iOS requirement (14.0 vs 16.0). On price, update cadence, ads and in-app purchases there is nothing between them.

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

SynStrategy holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 41 and 9 respectively. Written reviews point the same way: 81% of ReactionFlash's written reviews are positive against 100% of SynStrategy's.

ReactionFlash ships an update every 4 months, SynStrategy every 3 months. The most recent releases landed on September 21, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | ReactionFlash | SynStrategy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (41 ratings)](https://appshunter.io/ios/app/reactionflash/id432080813/reviews) | **[5.0 (9 ratings)](https://appshunter.io/ios/app/synstrategy/id6755611244/reviews)** |
| Number of ratings | **41** | 9 |
| Positive reviews | 80.6% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | Free | Free |
| Size | 37 MB | 36 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Elsevier Limited](https://appshunter.io/developer/1437273934) | [Willi M. Amberg](https://appshunter.io/developer/1854863487) |

## What reviewers say

### ReactionFlash

[App page](https://appshunter.io/ios/app/reactionflash/id432080813)

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:** macOS Compatibility

**In-app purchases:** none


### SynStrategy

[App page](https://appshunter.io/ios/app/synstrategy/id6755611244)

This app categorizes organic reactions by the functional groups they form, aiding chemists in synthetic analysis. It offers over 500 transformations and 400 synthesis examples, with detailed subdivisions for clarity.

**Highlights:** Reactions categorized by functional group, 27 main functional group categories, Over 500 transformations, Over 400 total synthesis examples, Subdivided functional group categories, Highlights synthetic use cases

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ReactionFlash free?

ReactionFlash is free to download, with no in-app purchases.

### Is SynStrategy free?

SynStrategy is free to download, with no in-app purchases.

### Which has better reviews, ReactionFlash or SynStrategy?

SynStrategy is rated higher. ReactionFlash averages 4.8 out of 5 from 41 ratings, while SynStrategy averages 5.0 from 9 ratings.

### Do ReactionFlash or SynStrategy have ads?

Neither ReactionFlash nor SynStrategy shows ads.

### Which is updated more often, ReactionFlash or SynStrategy?

ReactionFlash ships an update every 4 months, and SynStrategy every 3 months. Most recently, ReactionFlash was updated on September 21, 2026 and SynStrategy on September 11, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*