Comparison

Harriet Lane Handbook App vs PREP Self

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Harriet Lane Handbook App

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
Currently charting
Read full description

"Try before you buy" - Download the FREE App, which includes sample content. An in-App purchase is required to unlock all content. #1 source of pediatric point-of-care clinical information. One-of-a-kind pediatric formulary. 35+ Built-in calculators. 35+ Interactive flowcharts Your #1 source of pediatric point-of-care clinical information. Every three years, The Harriet Lane Handbook is carefully updated by residents, edited by chief residents, and reviewed by expert faculty at The Johns Hopkins Hospital. Easy to use, concise, and complete, this essential manual keeps you current with new guidelines, practice parameters, pharmacology, and more. This portable reference continues to be the most widely used and most recognized pediatric reference worldwide—an indispensable resource for pediatric residents, students, nurses, and all healthcare professionals who treat young patients. Key Features - Trusted for 70 years for fast, accurate information on pediatric diagnosis and treatment. - New audio case files: Listen to residents and faculty at The Johns Hopkins Hospital discuss case studies and healthcare disparities based on topics from this bestselling book. - The popular and comprehensive Pediatric Drug Formulary, updated by Carlton K. K. Lee, PharmD, MPH, provides the latest in pharmacologic treatment of pediatric patients. - Outline format ensures you’ll find information quickly and easily, even in the most demanding circumstances. Content licensed from printed ISBN 10: 0323876986 Content licensed from printed ISBN 13: 9780323876988 SUBSCRIPTION : Please purchase a yearly auto-renewing subscription to receive content access and continuous updates. Your subscription automatically renews every year, so you always have the latest content. Yearly auto-renewing payments- $49.99 Six Months auto-renewing payments- $32.99 Payment will be charged to your iTunes Account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Subscription may be managed by the user and auto-renewal can be disabled at any time by going to your device “Settings” and tapping “iTunes & App Store”. Any unused portion of a free trial period will be forfeited when you purchase a subscription, where applicable." If you have any questions or comments, email us any time: customersupport@skyscape.com or call 508-299-3000 Privacy Policy - https://www.skyscape.com/terms-of-service/privacypolicy.aspx Terms and Conditions - https://www.skyscape.com/terms-of-service/licenseagreement.aspx Author(s)/Editor(s): Johns Hopkins Hospital, Camille C. Anderson, Sunaina Kapoor, Tiffany E Mark, Nicole Shilkofski, Carlton K. Lee Publisher: Elsevier Health Sciences Company

About

PREP Self

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
Read full description

Trusted PREP® Content, New Mobile App! For nearly 45 years, the PREP Self-Assessment Program has been a trusted source for pediatric learning and professional growth. Now, we're reimagining the experience. Meet PREP Blocks: A new, customizable way to access the same trusted PREP questions you know and value, designed to fit your learning style, pace, and schedule. • Enjoy a modern, user-friendly interface with a long-awaited mobile app and new desktop experience • Build a Question Bank by selecting blocks from content areas that match your goals • 20 case-based questions per block • Earn up to 4 AMA PRA Category 1 Credits™ and 4 MOC Part 2 Points with each block

Screenshots

Harriet Lane Handbook App4 screens
PREP Self4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard9 real differences · 2 level
Harriet Lane Handbook App versus PREP Self: the parameters behind the verdict, then further details
ParameterHarriet Lane Handbook AppPREP Self
PriceFreeFree
Rating4.6 (106 ratings) — better3.7 (9 ratings)
Positive reviews83.3% of reviews — better66.7% of reviews
Number of ratings106 — better9
Update frequencyEvery 6 monthsDaily — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
Best chart rank#191 — better—
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS13.0 — better15.6
Further details — not scored
Size46 MB45 MB
Age rating17+4+
DeveloperSkyscape Medpresso IncAmerican Academy of Pediatrics

Customer experience

Harriet Lane Handbook App

All ratings106 ratings
Positive90.6%
Neutral1.9%
Negative7.5%
Written reviews6 reviews
Positive83.3%
Neutral0.0%
Negative16.7%

PREP Self

All ratings9 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

In-app purchases

8 purchases

Harriet Lane Handbook App

Subscriptions7
  • Harriet Lane Handbook 3M Sub$25.993 Months
  • Harriet Lane Handbook 6M Sub$32.996 Months
  • 25% off-HarrietLane HBK 1YSub$37.491 Year
Show 4 more
  • Harriet Lane HBK 1 Y Sub offer$39.991 Year
  • 20% off-HarrietLane HBK 1YSub$39.991 Year
  • 15% off-HarrietLane HBK 1YSub$42.491 Year
  • Harriet Lane Handbook 1/Y Sub.$49.991 Year
One-time1
  • Harriet Lane HBK Pediatric$54.99
None

PREP Self

No in-app purchases

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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