# ReactionFlash vs Tap OChem Lite

ReactionFlash and Tap OChem Lite both sit at 4.8 stars, but that hides the real split: 81% of ReactionFlash's written reviews are positive against 50% of Tap OChem Lite's. ReactionFlash also leads on update cadence (every 4 months vs every 11 months). On price, rating, ratings volume and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.8 for ReactionFlash against 4.9 for Tap OChem Lite. Both are backed by a comparable volume of ratings — 41 and 20 respectively. Written reviews are what separate them: 81% of ReactionFlash's written reviews are positive against 50% of Tap OChem Lite's.

ReactionFlash ships an update every 4 months, Tap OChem Lite every 11 months. The most recent releases landed on September 29, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | ReactionFlash | Tap OChem Lite |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (41 ratings)](https://appshunter.io/ios/app/reactionflash/id432080813/reviews) | **[4.9 (20 ratings)](https://appshunter.io/ios/app/tap-ochem-lite/id763895340/reviews)** |
| Number of ratings | **41** | 20 |
| Positive reviews | **80.6% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 11 months |
| Monetization | Free | Free |
| Size | 37 MB | 536 MB |
| Requires iOS | **14.0** | 14.5 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Elsevier Limited](https://appshunter.io/developer/1437273934) | [Tap OChem, LLC](https://appshunter.io/developer/579861209) |

## 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


### Tap OChem Lite

[App page](https://appshunter.io/ios/app/tap-ochem-lite/id763895340)

Visualize and understand key organic chemistry concepts, molecules, and reactions through high-quality animations. This app offers a taste of the full version, featuring common undergraduate organic chemistry topics with accompanying text descriptions and electron-pushing diagrams.

**Highlights:** Organic reaction animations, Key concept visualizations, Electron pushing diagrams, Text descriptions, Periodic table reference, Molecules in motion

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ReactionFlash free?

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

### Is Tap OChem Lite free?

Tap OChem Lite is free to download, with no in-app purchases.

### Which has better reviews, ReactionFlash or Tap OChem Lite?

Tap OChem Lite is rated higher. ReactionFlash averages 4.8 out of 5 from 41 ratings, while Tap OChem Lite averages 4.9 from 20 ratings.

### Do ReactionFlash or Tap OChem Lite have ads?

Neither ReactionFlash nor Tap OChem Lite shows ads.

### Which is updated more often, ReactionFlash or Tap OChem Lite?

ReactionFlash ships an update every 4 months, and Tap OChem Lite every 11 months. Most recently, ReactionFlash was updated on September 29, 2026 and Tap OChem Lite on September 23, 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.*