# RedShelf vs The Watch Prep

The clearest difference is in-app purchases: RedShelf at none against The Watch Prep's 2. The Watch Prep's advantage is update cadence (every 2 days vs every 5 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. The Watch Prep sells 2 one-off in-app purchases. RedShelf asks for nothing beyond the download.

RedShelf ships an update every 5 weeks, The Watch Prep every 2 days. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | RedShelf | The Watch Prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (7.1K ratings)](https://appshunter.io/ios/app/redshelf/id1511013608/reviews)** | — |
| Number of ratings | **7.1K** | — |
| Positive reviews | 3.1% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 2 days** |
| Monetization | Free | — |
| Size | 26 MB | 3 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [RedShelf](https://appshunter.io/developer/1511013606) | [GREG WILLIAM KRAFT](https://appshunter.io/developer/6806928626) |

## What reviewers say

### RedShelf

[App page](https://appshunter.io/ios/app/redshelf/id1511013608)

Access and read your digital textbooks on any device. Highlight text, take notes, create flashcards, and have content read aloud. Your notes and highlights sync across all your devices.

**Highlights:** Access textbooks on any device, Highlight text and take notes, Create flashcards from content, Define unfamiliar words, Text-to-speech functionality, Sync notes and highlights across devices

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Convenient to access textbooks in one place
- 🚀 Decent overall performance

**What reviewers complain about**

- 🐛 Frequent crashes and glitches
- 💤 Slow loading and page turning
- 👎 Unreliable highlighting and note-taking features
- 🤖 Poor text-to-speech functionality
- 📵 Inability to access books offline

**Reported bugs**

- Books not loading or showing blank screens
- Highlighting issues (selecting wrong text, unable to edit)
- Sync issues between devices and web version

**Requested features**

- Improve highlighting and annotation tools
- Add support for split-screen mode
- Enhance text-to-speech capabilities
- Allow offline access to downloaded books


### The Watch Prep

[App page](https://appshunter.io/ios/app/the-watch-prep/id6811791918)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sergeant Pack | $49.99 | one-time |
| Detective Pack | $49.99 | one-time |


## Frequently asked questions

### Is RedShelf free?

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

### Is The Watch Prep free?

The Watch Prep is free to download, with in-app purchases available.

### Do RedShelf or The Watch Prep have ads?

Neither RedShelf nor The Watch Prep shows ads.

### Which is updated more often, RedShelf or The Watch Prep?

RedShelf ships an update every 5 weeks, and The Watch Prep every 2 days. Most recently, RedShelf was updated on October 21, 2026 and The Watch Prep on October 24, 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.*