# ReactionFlash vs Crack DAT READING

The clearest difference is update cadence: ReactionFlash at every 4 months against Crack DAT READING's every 87 months. ReactionFlash also leads on ratings volume (41 vs 3) and iOS requirement (14.0 vs 18.0). Crack DAT READING's advantage is review sentiment (100% vs 81%) and rating (5.0 vs 4.8). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Crack DAT READING holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: ReactionFlash has 41 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 81% of ReactionFlash's written reviews are positive against 100% of Crack DAT READING's.

ReactionFlash ships an update every 4 months, Crack DAT READING every 87 months. The most recent releases landed on September 21, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | ReactionFlash | Crack DAT READING |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (41 ratings)](https://appshunter.io/ios/app/reactionflash/id432080813/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/crack-dat-reading/id1471483611/reviews)** |
| Number of ratings | **41** | 3 |
| Positive reviews | 80.6% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 87 months |
| Monetization | Free | Free |
| Size | 37 MB | 35 MB |
| Requires iOS | **14.0** | 18.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Elsevier Limited](https://appshunter.io/developer/1437273934) | [Crack Exam Preparation Software, LLC](https://appshunter.io/developer/1076616463) |

## 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


### Crack DAT READING

[App page](https://appshunter.io/ios/app/crack-dat-reading/id1471483611)

Prepare for the Reading Comprehension section of the Dental Admission Test with video crash courses, full-length practice tests, and detailed performance analysis. Improve your scores, estimate your results, and gain a competitive edge for dental school admissions.

**Highlights:** Reading Comprehension Crash Course Videos, 10 Full Length Practice Tests, 500 Practice Questions, Performance Analysis Reports, Score Estimation, Automatic Updates

**In-app purchases:** none


## Frequently asked questions

### Is ReactionFlash free?

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

### Is Crack DAT READING free?

Crack DAT READING is free to download, with no in-app purchases.

### Which has better reviews, ReactionFlash or Crack DAT READING?

Crack DAT READING is rated higher. ReactionFlash averages 4.8 out of 5 from 41 ratings, while Crack DAT READING averages 5.0 from 3 ratings.

### Do ReactionFlash or Crack DAT READING have ads?

Neither ReactionFlash nor Crack DAT READING shows ads.

### Which is updated more often, ReactionFlash or Crack DAT READING?

ReactionFlash ships an update every 4 months, and Crack DAT READING every 87 months. Most recently, ReactionFlash was updated on September 21, 2026 and Crack DAT READING on September 19, 2026.

---

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