# Harriet Lane Handbook App vs PREP Self

The clearest difference is rating: Harriet Lane Handbook App at 4.6 against PREP Self's 3.7. Harriet Lane Handbook App also leads on review sentiment (83% vs 67%) and ratings volume (106 vs 9). PREP Self's advantage is in-app purchases (none vs 8) and ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Harriet Lane Handbook App sells 8 in-app purchases, starting at $25.99 per 3 months. PREP Self asks for nothing beyond the download.

Harriet Lane Handbook App holds the better App Store score, 4.6 against 3.7. That said, the two scores are not equally well evidenced: Harriet Lane Handbook App has 106 ratings behind it against 9, so its average is the more settled of the two. Written reviews point the same way: 83% of Harriet Lane Handbook App's written reviews are positive against 67% of PREP Self's.

Harriet Lane Handbook App ships an update every 6 months, PREP Self daily. The most recent releases landed on November 6, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Harriet Lane Handbook App | PREP Self |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (106 ratings)](https://appshunter.io/ios/app/harriet-lane-handbook-app/id1076513505/reviews)** | [3.7 (9 ratings)](https://appshunter.io/ios/app/prep-self-assessments-program/id6756599702/reviews) |
| Number of ratings | **106** | 9 |
| Positive reviews | **83.3% of reviews** | 66.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 6 months | **Daily** |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | **#191** | — |
| Size | 46 MB | 45 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Skyscape Medpresso Inc](https://appshunter.io/developer/818609416) | [American Academy of Pediatrics](https://appshunter.io/developer/409863343) |

## What reviewers say

### Harriet Lane Handbook App

[App page](https://appshunter.io/ios/app/harriet-lane-handbook-app/id1076513505)

**Currently charting:** #191 Top Grossing · Medical (US App Store)

This pediatric drug formulary provides point-of-care clinical information, including calculators and flowcharts. It offers trusted, concise, and complete guidance for healthcare professionals treating young patients, updated regularly by experts.

**Highlights:** Pediatric point-of-care clinical information, 35+ built-in calculators, 35+ interactive flowcharts, New audio case files, Comprehensive Pediatric Drug Formulary, Outline format for quick access

**Features:** Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Harriet Lane Handbook 3M Sub | $25.99 | per 3 months |
| Harriet Lane Handbook 6M Sub | $32.99 | per 6 months |
| 25% off-HarrietLane HBK 1YSub | $37.49 | per year |
| Harriet Lane HBK 1 Y Sub offer | $39.99 | per year |
| 20% off-HarrietLane HBK 1YSub | $39.99 | per year |
| 15% off-HarrietLane HBK 1YSub | $42.49 | per year |
| Harriet Lane Handbook 1/Y Sub. | $49.99 | per year |
| Harriet Lane HBK Pediatric | $54.99 | one-time |


### PREP Self

[App page](https://appshunter.io/ios/app/prep-self-assessments-program/id6756599702)

This app provides a customizable way to access trusted pediatric learning content. Users can build a question bank by selecting blocks of content areas to fit their learning style and schedule, earning credits and points upon completion.

**Highlights:** Customizable question bank, Select content blocks, Case-based questions, Earn CME credits, Earn MOC points, Modern user interface

**In-app purchases:** none


## Frequently asked questions

### Is Harriet Lane Handbook App free?

Harriet Lane Handbook App is free to download, with in-app purchases available.

### Is PREP Self free?

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

### Which has better reviews, Harriet Lane Handbook App or PREP Self?

Harriet Lane Handbook App is rated higher. Harriet Lane Handbook App averages 4.6 out of 5 from 106 ratings, while PREP Self averages 3.7 from 9 ratings.

### Do Harriet Lane Handbook App or PREP Self have ads?

Harriet Lane Handbook App shows ads; PREP Self does not.

### Which is updated more often, Harriet Lane Handbook App or PREP Self?

Harriet Lane Handbook App ships an update every 6 months, and PREP Self daily. Most recently, Harriet Lane Handbook App was updated on November 6, 2026 and PREP Self on November 5, 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.*