# ReactionFlash vs Biochemistry Practice

The clearest difference is in-app purchases: ReactionFlash at none against Biochemistry Practice's 1. ReactionFlash also leads on update cadence (every 4 months vs every 11 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Biochemistry Practice sells 1 one-off in-app purchase. ReactionFlash asks for nothing beyond the download.

ReactionFlash ships an update every 4 months, Biochemistry Practice every 11 months. The most recent releases landed on November 13, 2026 and November 15, 2026 respectively.

## The numbers

| Metric | ReactionFlash | Biochemistry Practice |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (42 ratings)](https://appshunter.io/ios/app/reactionflash/id432080813/reviews)** | — |
| Number of ratings | **42** | — |
| Positive reviews | 80.6% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 11 months |
| Monetization | Free | — |
| Size | 40 MB | 34 MB |
| Requires iOS | 15.5 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Elsevier Limited](https://appshunter.io/developer/1437273934) | [Manish Kumar](https://appshunter.io/developer/1854995154) |

## What reviewers say

### ReactionFlash

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

This app helps students and chemists review and understand named chemical reactions, their mechanisms, and examples from scientific literature. It functions like flashcards and includes a quiz mode to test knowledge.

**Highlights:** Learn named chemical reactions, Understand reaction mechanisms, View literature examples, Quiz mode for knowledge testing, Flashcard-style learning, Extensive collection of reactions

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

**In-app purchases:** none


### Biochemistry Practice

[App page](https://appshunter.io/ios/app/biochemistry-practice/id6756246296)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads Permanently | $0.49 | one-time |


## Frequently asked questions

### Is ReactionFlash free?

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

### Is Biochemistry Practice free?

Biochemistry Practice is free to download, with in-app purchases available.

### Do ReactionFlash or Biochemistry Practice have ads?

Neither ReactionFlash nor Biochemistry Practice shows ads.

### Which is updated more often, ReactionFlash or Biochemistry Practice?

ReactionFlash ships an update every 4 months, and Biochemistry Practice every 11 months. Most recently, ReactionFlash was updated on November 13, 2026 and Biochemistry Practice on November 15, 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.*