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NEJM Image Challenge

by The New England Journal of Medicine

  • Medical
  • Paid
  • Zombie
  • Small & simple · 100
View on the App Store
Rating
4.8
9 ratings · US storefront
Top 84%among 91 Medical apps
Last update
May 6, 2020
Version 1.7
Size
5 MB
Category
Medical
Tracked since
Oct 9, 2026

Estimated revenue

A model estimate with a likely range, not a reported figure.

No estimate. Apps outside the grossing charts, and some countries, have no reliable rank-to-revenue curve, so we show nothing rather than a guess.

How this estimate is made

Rank: we take the app's best Top Grossing rank on the latest chart day. Category ranks are converted into an equivalent overall rank, because a #10 in Finance earns far less than a #10 overall.

Curve: that equivalent rank is read off a rank-to-revenue curve anchored on public company revenue and market-data reports for the US iPhone App Store.

Country: the curve is scaled per country (Japan is roughly a third of the US, Türkiye under 1%). Where we have no scale, such as China, there is no estimate.

Range: the likely range widens with country, category and chart depth. It is a plausible span, not a statistical confidence interval.

Not included: ads, payments outside the App Store, and any difference between gross sales and what the developer keeps. Low confidence means indirect data; medium means several independent sources agree.

Full method

Screenshots

As shown on the App Store listing.

About this app

Text from the App Store listing.

The NEJM Image Challenge App brings a popular online feature for medical professionals to the iPhone and iPod Touch. Optimized for viewing on the iPhone and iPod Touch, the NEJM Image Challenge App helps you to test and hone your diagnostic and visual skills anytime, anywhere. Please note: Minimum OS version supported is iOS 7.0.

The New England Journal of Medicine is known for its compelling medical graphics and illustrations. The NEJM Image Challenge App randomly selects from over 400 challenging clinical photos published weekly in the NEJM Images in Clinical Medicine series. Choose an image and answer multiple-choice questions. Keep taking the challenge until you get it right and then move on to the next challenge!

Features:

  • Detailed images – zoom in to take a closer look
  • Get immediate feedback – gain more information about the diagnosis
  • See how others answered and how many took the challenge
  • Launch or refresh the app for a new selection of random images

Check out NEJM This Week, another NEJM iPhone/iTouch app for medical professionals offering free access to recent articles, and a selection of images, audio and video.

ABOUT THE NEW ENGLAND JOURNAL OF MEDICINE
The New England Journal of Medicine (NEJM) is the most widely read, cited and influential general medical journal in the world and the longest continuously published medical periodical. NEJM is dedicated to bringing physicians the best research and key information at the intersection of biomedical science and clinical practice, and to presenting the information in an understandable and clinically useful format. A career companion, NEJM is a vital, go-to resource for keeping practicing physicians aware of developments of importance to their patients and for training medical students and residents. The New England Journal of Medicine is a publication of NEJM Group, a division of the Massachusetts Medical Society.

We welcome your feedback. Please send comments to [email protected].

What’s new

Release notes for the latest version, as written by the developer.

v1.7

Updates for text size handling. Since the app was not created to handle larger text sizes, we saw an alignment issue on the settings screen when the user sets their font to the largest standard font size, or turns on the larger font sizes for visually-impaired users.

Rank history

Daily position in the Ecuador charts. #1 is at the top.

Best rank
#1
Current rank
#1
Days charting
7 of 7

On the charts today

Small & simple score

How realistic it is for a small team to build something like this.

100/100

Small & simple

  • Developer size100% · 25

    Developer: 1 app on the charts

  • Audience size100% · 20

    Ratings: 1

  • App size100% · 10

    Size: 5 MB

  • Price model100% · 15

    Price model: paid

  • Demand proof100% · 30

    Best rank #1, 98 countries

An indicator, not a fact. We can't see team size. Calculated Oct 24, 2026 · method i2

How the score works

Version history

  • 1.7LatestReleased May 6, 2020