# Bilirubin vs Red Book®

Bilirubin and Red Book® both sit at 4.9 stars, but that hides the real split: 100% of Bilirubin's written reviews are positive against 0% of Red Book®'s. Bilirubin also leads on in-app purchases (none vs 2) and update cadence (every 3 months vs every 11 months). Red Book®'s advantage is price (Free vs $9.99) and device support (4 vs 2). On rating, ads and iOS requirement there is nothing between them.

Red Book® is free to download; Bilirubin costs $9.99 up front. Red Book® sells 2 one-off in-app purchases. Bilirubin asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.9 for Bilirubin against 4.8 for Red Book®. Both are backed by a comparable volume of ratings — 243 and 67 respectively. Written reviews are what separate them: 100% of Bilirubin's written reviews are positive against 0% of Red Book®'s.

Bilirubin ships an update every 3 months, Red Book® every 11 months. The most recent releases landed on September 23, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Bilirubin | Red Book® |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[4.9 (243 ratings)](https://appshunter.io/ios/app/bilirubin-bilitool-bili-tool/id1502436998/reviews)** | [4.8 (67 ratings)](https://appshunter.io/ios/app/red-book/id1586673573/reviews) |
| Number of ratings | **243** | 67 |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 11 months |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 8 MB | 9 MB |
| Requires iOS | 15 | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 17+ | 17+ |
| Developer | [Jeffrey Fulton](https://appshunter.io/developer/1843978616) | [Unbound Medicine, Inc.](https://appshunter.io/developer/300420400) |

## What reviewers say

### Bilirubin

[App page](https://appshunter.io/ios/app/bilirubin-bilitool-bili-tool/id1502436998)

This app provides offline access to the latest American Academy of Pediatrics guidelines for managing hyperbilirubinemia in newborns. It offers recommendations based on age, bilirubin levels, and risk factors, with visual nomograms and support for both US and SI units.

**Highlights:** Offline AAP guideline access (2022 & 2004), Management recommendations based on patient data, Guideline nomograms for visualization, Support for US and SI units, Risk factor reference list, Direct links to guideline sections

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

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Bilirubin free?

Bilirubin costs $9.99, with no in-app purchases.

### Is Red Book® free?

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

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

Bilirubin is rated higher. Bilirubin averages 4.9 out of 5 from 243 ratings, while Red Book® averages 4.8 from 67 ratings.

### Do Bilirubin or Red Book® have ads?

Neither Bilirubin nor Red Book® shows ads.

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

Bilirubin ships an update every 3 months, and Red Book® every 11 months. Most recently, Bilirubin was updated on September 23, 2026 and Red Book® on September 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.*