# Red Book® vs CatchUpPeds

The clearest difference is update cadence: CatchUpPeds at every 3 days against Red Book®'s every 11 months. Red Book®'s advantage is device support (4 vs 2) and iOS requirement (15.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Red Book® sells 2 one-off in-app purchases and CatchUpPeds sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Red Book® ships an update every 11 months, CatchUpPeds every 3 days. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Red Book® | CatchUpPeds |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (71 ratings)](https://appshunter.io/ios/app/red-book/id1586673573/reviews)** | — |
| Number of ratings | **71** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 9 MB | 6 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [Unbound Medicine, Inc.](https://appshunter.io/developer/300420400) | [Sven van Egmond](https://appshunter.io/developer/6792272389) |

## 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 |


### CatchUpPeds

[App page](https://appshunter.io/ios/app/catchuppeds-pediatrics/id6806004561)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small coffee for developer | $1.99 | one-time |
| Large coffee for developer | $6.99 | one-time |


## Frequently asked questions

### Is Red Book® free?

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

### Is CatchUpPeds free?

CatchUpPeds is free to download, with in-app purchases available.

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

Neither Red Book® nor CatchUpPeds shows ads.

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

Red Book® ships an update every 11 months, and CatchUpPeds every 3 days. Most recently, Red Book® was updated on October 22, 2026 and CatchUpPeds 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.*