# Antimicrobial Guide vs Red Book®

The clearest difference is in-app purchases: Antimicrobial Guide at none against Red Book®'s 2. Antimicrobial Guide also leads on update cadence (every 3 weeks vs every 11 months) and rating (5.0 vs 4.8). Red Book®'s advantage is ratings volume (67 vs 2) and chart position (#196 vs unranked). On price, ads and device support there is nothing between them.

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

Antimicrobial Guide holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Red Book® has 67 ratings behind it against 2, so its average is the more settled of the two.

Antimicrobial Guide ships an update every 3 weeks, Red Book® every 11 months. The most recent releases landed on October 2, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Antimicrobial Guide | Red Book® |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/antimicrobial-guide/id1032955474/reviews)** | [4.8 (67 ratings)](https://appshunter.io/ios/app/red-book/id1586673573/reviews) |
| Number of ratings | 2 | **67** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 11 months |
| Monetization | **Free** | Free with in-app purchases |
| Best chart rank | — | **#196** |
| Size | 1 MB | 9 MB |
| Requires iOS | **7.0** | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 17+ | 17+ |
| Developer | [Portable Databases](https://appshunter.io/developer/333398128) | [Unbound Medicine, Inc.](https://appshunter.io/developer/300420400) |

## What reviewers say

### Antimicrobial Guide

[App page](https://appshunter.io/ios/app/antimicrobial-guide/id1032955474)

This app assists healthcare professionals in choosing the right antimicrobial treatments for patients. It displays recommended drug regimens based on local guidelines after a database is loaded. It's a convenient tool for distributing treatment guidelines.

**Highlights:** Select infection of interest, Display recommended drug regimens, Utilize local healthcare institution guidelines, Distribute empiric antimicrobial treatment guidelines, Convenient clinician tool

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

**In-app purchases:** none


### Red Book®

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

**Currently charting:** #196 Top Grossing · Medical (US App Store)

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 Antimicrobial Guide free?

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

### Is Red Book® free?

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

### Which has better reviews, Antimicrobial Guide or Red Book®?

Antimicrobial Guide is rated higher. Antimicrobial Guide averages 5.0 out of 5 from 2 ratings, while Red Book® averages 4.8 from 67 ratings.

### Do Antimicrobial Guide or Red Book® have ads?

Neither Antimicrobial Guide nor Red Book® shows ads.

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

Antimicrobial Guide ships an update every 3 weeks, and Red Book® every 11 months. Most recently, Antimicrobial Guide was updated on October 2, 2026 and Red Book® on October 13, 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.*