# Red Book® vs LCAST

The clearest difference is rating: Red Book® at 4.8 against LCAST's 4.3. Red Book® also leads on ratings volume (67 vs 8). LCAST's advantage is in-app purchases (none vs 2) and iOS requirement (9.0 vs 15.0). On price, review sentiment, update cadence and ads there is nothing between them.

Both are free to download. Red Book® sells 2 one-off in-app purchases. LCAST asks for nothing beyond the download.

Red Book® holds the better App Store score, 4.8 against 4.3. That said, the two scores are not equally well evidenced: Red Book® has 67 ratings behind it against 8, so its average is the more settled of the two. Written reviews split almost evenly too, at 0% and 0% positive.

Red Book® ships an update every 11 months, LCAST every 21 months. The most recent releases landed on September 24, 2026 and August 17, 2026 respectively.

## The numbers

| Metric | Red Book® | LCAST |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (67 ratings)](https://appshunter.io/ios/app/red-book/id1586673573/reviews)** | [4.3 (8 ratings)](https://appshunter.io/ios/app/lcast/id1663066252/reviews) |
| Number of ratings | **67** | 8 |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 11 months** | Every 21 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 9 MB | 146 MB |
| Requires iOS | 15.0 | **9.0** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Unbound Medicine, Inc.](https://appshunter.io/developer/300420400) | [igNew, LLC dba Slingshot](https://appshunter.io/developer/1663066254) |

## What reviewers say

### Red Book®

[App page](https://appshunter.io/ios/app/red-book/id1586673573)

This app provides the latest information on pediatric infectious diseases from the American Academy of Pediatrics. It includes immunization schedules, vaccine status, influenza resources, and new chapters on COVID-19 and Mpox. Features like note-taking and enhanced search aid quick access to essential medical data.

**Highlights:** Immunization schedules, Vaccine status table, Influenza resources, COVID-19 and Mpox chapters, Note-taking and highlighting, Enhanced search functionality

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Red Book 32e | $99.99 | one-time |
| Red Book | $99.99 | one-time |


### LCAST

[App page](https://appshunter.io/ios/app/lcast/id1663066252)

This medical tool aids healthcare professionals in assessing the plausibility of bruising in young children. It utilizes a validated clinical decision rule to help identify potential abuse by analyzing bruise characteristics and body locations. The app serves as a screening tool to inform decision-making and educate users on bruising patterns.

**Highlights:** Bruising clinical decision rule (TEN-4-FACESp), Interactive 3D body model for inputting observations, Compares bruise findings to published evidence, Screening tool for children under 4.0 years, Educational tool for healthcare providers, Data based on multi-center NIH-funded study

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Red Book® free?

Red Book® is free to download, with in-app purchases available.

### Is LCAST free?

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

### Which has better reviews, Red Book® or LCAST?

Red Book® is rated higher. Red Book® averages 4.8 out of 5 from 67 ratings, while LCAST averages 4.3 from 8 ratings.

### Do Red Book® or LCAST have ads?

Neither Red Book® nor LCAST shows ads.

### Which is updated more often, Red Book® or LCAST?

Red Book® ships an update every 11 months, and LCAST every 21 months. Most recently, Red Book® was updated on September 24, 2026 and LCAST on August 17, 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.*