USMLE Pediatrics Q&A by LANGE
Research answer
What AppTrendKit can say about USMLE Pediatrics Q&A by LANGE today
USMLE Pediatrics Q&A by LANGE has no estimate-backed download or gross-consumer-spend figure that meets the public evidence contract yet.
Observed App Store metadata, chart positions, and history are shown below. Missing, non-finite, undefined-currency, or undefined-metric evidence stays missing rather than becoming zero.
Performance intelligence
Observed trajectory and estimates
Store ranks are observations. Downloads and gross store consumer spend are AppTrendKit estimates and only appear when persisted evidence exists.
Estimated downloads · 30D
ModeledNo persisted estimate
The page does not turn missing evidence into zero.
Estimated App Store gross consumer spend · 30D
ModeledNo persisted estimate
The page does not turn missing evidence into zero.
Estimated downloads · 7D
ModeledNo persisted estimate
The page does not turn missing evidence into zero.
Estimated App Store gross consumer spend · 7D
ModeledNo persisted estimate
The page does not turn missing evidence into zero.
Evidence history
Collected daily performance
No daily metric history has been persisted yet.
Rank history
Observed chart positions
Lower rank is better. Only collected observations are shown.
Coverage note
What the ranks mean
A missing rank is not treated as zero downloads or zero revenue. Apple chart feeds are bounded and may return censored or not-ranked observations outside the visible chart depth.
Read the methodStorefront mix
Top countries by estimated contribution
Country estimates are aggregated only after country-level predictions exist.
Monetization
Observed store economics signals
These are listing and product observations. They are not company revenue, subscriber counts, or advertising revenue.
App details
Store metadata
- Version
- 8.16.6379
- Released
- Nov 1, 2011
- Last updated
- Jan 6, 2020
- Content rating
- 17+
- Default storefront
- PH
Public IAP observations
Validated in-app purchase prices
Only persisted rows with an explicit public publication boundary are shown. Missing price, currency, country, or date values stay unknown.
Listing detail
What the store says
With questions and detailed answers covering topics included in the USMLE Step 2 and Pediatric Clerkship Exams, Pediatrics Q&A by LANGE is the best place to complete your test prep. Install the free version today and jump start your studying! We have provided a limited free version of the app that you can try before deciding to upgrade. This version includes a limited amount of practice questions and basic progress metrics. Subscribe today and get access to: • 810+ practice questions • Detailed explanations with images • Developed by experts • 160+ tough quiz questions • Unlimited access to ALL categories: • Growth and development • Feeding and nutrition • Diagnosis, management • General pediatrics and more! • Detailed results tracking This dynamic study tool allows you to flag questions as you go, allowing for easier review of problem areas. By offering a rigorous review of key pediatric concepts and facts, this pediatrics review gives you the knowledge you need to master the USMLE and pediatric boards and begin your rewarding professional career. About the Authors: Mary Anne Jackson, MD Chief, Section of Pediatric Infectious Diseases Children's Mercy Hospital & Clinics Professor of Pediatrics University of Missouri, Kansas City School of Medicine Kansas City, MO Sara S. Viessman, MD Former Director, Pediatric Residency Program and Associate Professor Former Director, Med-Peds Residency Program University of Missouri-Columbia School of Medicine Columbia, MO Former Associate Dean for Medical Education at Lehigh Valley Hospital Penn State College of Medicine Allentown, PA Get access to all questions when you subscribe: • 1 Month: one auto-renewing payment of $17.99 • 12 Months: one auto-renewing payment of $49.99 This app offers two auto-renewing subscription options to help you pass your exam. -Payment will be charged to 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 -Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal -Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase -Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable These prices are for United States customers. Pricing in other countries may vary and actual charges may be converted to your local currency depending on the country of residence. Our Customer Success Team is available from 9am to 5pm, Monday - Friday (except on major holidays). Call us at 319-246-5271 and email us at support@hltcorp.com with any questions. Privacy Policy - http://builtbyhlt.com/privacy Terms of Conditions - http://builtbyhlt.com/EULA
Store creative
Screenshots
Competitive set
Similar apps
Deterministic links to real stored apps matched by category, publisher, and comparable performance bands.
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Methodology and provenance
Read every number with its evidence
Metadata source: Apple iTunes Search API; observed Sep 7, 2026, 8:39 PM.
Rankings: collected chart positions from the listed storefront. Missing ranks are not zeros.
Economics: downloads and gross store consumer spend are estimated, not official Apple or publisher figures.
Model: No persisted model version.
Confidence: —; intervals widen when evidence or history is limited.
Last observation: Sep 7, 2026, 8:39 PM.
See how AppTrendKit separates observations, estimates, coverage, and confidence.
Open methodology


