# Adrenaline E vs Prep DNB

The clearest difference is price: Adrenaline E at Free against Prep DNB's $0.99. Prep DNB's advantage is update cadence (every 3 weeks vs every 4 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Adrenaline E is free to download; Prep DNB costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Adrenaline E ships an update every 4 months, Prep DNB every 3 weeks. The most recent releases landed on September 29, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Adrenaline E | Prep DNB |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[2.0 (1 ratings)](https://appshunter.io/ios/app/adrenaline-e-books/id6747284366/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 119 MB | 47 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Anuj Gupta](https://appshunter.io/developer/1651060633) | [Sajil Haq](https://appshunter.io/developer/1887198954) |

## What reviewers say

### Adrenaline E

[App page](https://appshunter.io/ios/app/adrenaline-e-books/id6747284366)

This educational app provides K-12 students with online lectures and study materials to prepare for Medical College Entrance Exams. It focuses on building a strong foundation of knowledge through structured learning.

**Highlights:** Online lectures, Study materials, Structured preparation, Foundational knowledge building, Medical College Entrance Exam focus

**Features:** Vision Pro support

**In-app purchases:** none


### Prep DNB

[App page](https://appshunter.io/ios/app/prep-dnb/id6761892187)

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

**In-app purchases:** none


## Frequently asked questions

### Is Adrenaline E free?

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

### Is Prep DNB free?

Prep DNB costs $0.99, with no in-app purchases.

### Do Adrenaline E or Prep DNB have ads?

Neither Adrenaline E nor Prep DNB shows ads.

### Which is updated more often, Adrenaline E or Prep DNB?

Adrenaline E ships an update every 4 months, and Prep DNB every 3 weeks. Most recently, Adrenaline E was updated on September 29, 2026 and Prep DNB on September 27, 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.*