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Diagnosaurus® DDx

Unbound Medicine, Inc. · Medical · Japan store
NOT IN TOP 100 HERE
View on App Store ↗ Instagram card Google Play version →
Revenue a month, worldwide
Too small to estimate
Not enough chart or ratings data
New ratings
+1
in 2 days, 3.5K in total
Rating
4.6 of 5
95 ratings in this store
Countries it ranks in
1
was 2 on Oct 17, 2026

Revenue

Estimated from the grossing charts of Oct 23, 2026 in the 53 countries we track, and ratings growth on the App Store.

EST. REVENUE / MONTH · WORLDWIDE
Too small to estimate
It only ranks in small categories, where no app reaches the overall top 100, so there is no reliable figure. Under about $52.6K a month (estimate), usually far less.
EST. LIFETIME DOWNLOADS
3.3K to 9.5K
Estimated from ratings count
RATINGS
95
AVG RATING
4.57
PRICE
無料
AGE
12.6y
LAST UPDATE
6d ago
VERSION
1.15
SIZE
19 MB
AGE RATING
17+

Last 30 days

From our daily snapshots of every grossing chart and daily ratings counts.

DAYS IN A GROSSING CHART
24 / 30
COUNTRIES NOW
1 (was 1)
NEW RATINGS, LAST 2 DAYS
+1
EST. REVENUE A MONTH, DAILY · BOTH STORES EST
Show daily values
Sep 25, 2026not in a grossing chart
Sep 26, 2026not in a grossing chart
Sep 27, 2026not in a grossing chart
Sep 28, 2026not in a grossing chart
Sep 29, 2026not in a grossing chart
Sep 30, 2026not in a grossing chart
Oct 1, 2026not in a grossing chart
Oct 2, 2026not in a grossing chart
Oct 3, 2026not in a grossing chart
Oct 4, 2026not in a grossing chart
Oct 5, 2026not in a grossing chart
Oct 6, 2026not in a grossing chart
Oct 7, 2026not in a grossing chart
Oct 8, 2026not in a grossing chart
Oct 9, 2026not in a grossing chart
Oct 10, 2026$7K a month
Oct 11, 2026not in a grossing chart
Oct 12, 2026not in a grossing chart
Oct 13, 2026not in a grossing chart
Oct 14, 2026not in a grossing chart
Oct 15, 2026not in a grossing chart
Oct 16, 2026not in a grossing chart
Oct 17, 2026not in a grossing chart
Oct 18, 2026not in a grossing chart
Oct 19, 2026not in a grossing chart
Oct 20, 2026not in a grossing chart
Oct 21, 2026not in a grossing chart
Oct 22, 2026not in a grossing chart
Oct 23, 2026$1.2K a month
Oct 24, 2026not in a grossing chart
The same estimate as the headline, saved every day. Best rank Sep 25, 2026: #80 Medical · MX. Now: #46 Medical · NZ.
RATINGS IN THE CORE COUNTRIES, DAILY
Show daily values
Oct 22, 20263.5K ratings
Oct 23, 20263.5K ratings
Oct 24, 20263.5K ratings
3.5K on Oct 22, 2026, 3.5K on Oct 24, 2026. New ratings track new downloads, even outside the charts.

Money and momentum

Measured from the store, not estimated.

WHAT IT CHARGES
No in-app purchases
Earns from its upfront price, ads or payments outside the store.
REVIEW MOMENTUM
0.1 reviews / week
  • Trendfalling
  • Recent reviews average2.9 stars
  • Recent 1 and 2 star share49%
From the latest 53 written reviews, covering 4585 days.
RELEASE CADENCE
2 updates in 90 days
  • Typical gap between releases302 days
From the last 14 versions listed on the App Store.
RATING BREAKDOWN
95 ratings
5★74%
4★17%
3★4%
2★3%
1★2%

What users want

From the latest 53 reviews on the Japan App Store, Apr 4, 2014 to Aug 6, 2026: 49% are 1 or 2 stars. Open a theme to read what people wrote.

WHAT THEY COMPLAIN ABOUT · SHARE OF BAD REVIEWS
Price and subscription19%

5 of the 1 and 2 star reviews.

★★★★★ I have been waiting for the upgrade now for a year but I was disappointed to know that you have to buy it again full price with no upgrade price for previous customers.
★★★★★ Scam people to rebuy your products instead of updating it?
★★★★★ I bought the standalone non subscription app to prevent downstream costs with a huge upfront cost.
No customer support12%

3 of the 1 and 2 star reviews.

★★★★★ I am not even sure who to contact.
★★★★★ I'm thinking of buying the new one but don't want to support a company that's just gonna make me buy a new and functionally identical product every few years after they make your old one obsolete.
★★★★★ There is no customer support unless it is M-F 9-5, and we all know that patients only come to the hospital during those hours.
Bugs, things not working8%

2 of the 1 and 2 star reviews.

★★★★★ Restore purchase does not work and the app is shut out of basic functionality unless you pay for it again.
★★★★★ I have to pay twice for an app that no longer works when you tap on an entry. Do not download.
Lost data, sync, backup8%

2 of the 1 and 2 star reviews.

★★★★★ Restore purchase does not work and the app is shut out of basic functionality unless you pay for it again.
★★★★★ I already bought this app how come when i clicked restore purchase it says i havent purchased it yet?????
Worse after an update8%

2 of the 1 and 2 star reviews.

★★★★★ iOS 11 comes along and they are the ONLY app publisher that didn't update their product to work in iOS 11.
★★★★★ I previously payed full price for this app and now they did some update and can't use it anymore.
WHAT THEY ASK FOR
  • Can you add or tell me where to find Irregular Heart Rhythm. 4★, Apr 6, 2018
  • Just add an edit feature so I can type in other differentials that aren't included. 4★, Jul 8, 2015
WORDS THAT KEEP COMING UP IN BAD REVIEWS

Nothing stands out.

WHAT THEY LOVE · SHARE OF GOOD REVIEWS
Useful, it helps40%

10 of the 4 and 5 star reviews.

★★★★★ For years, I have used Diagnosaurus as an aid in practice and in teaching my medical students.
★★★★★ Useful as a first line differential Dx.
★★★★★ This app is a great tool when you have patients with vague symptoms.I have found it very helpful.
Easy to use16%

4 of the 4 and 5 star reviews.

★★★★★ In retirement the access to current literature diminished a rapid access in my e-phone.
★★★★★ I use the app frequently to look up differential.app is easy to use and well designed .
★★★★★ This software allows for easy access to essential information quickly.
Fast16%

4 of the 4 and 5 star reviews.

★★★★★ This app is a great tool when you have patients with vague symptoms.I have found it very helpful.
★★★★★ If you have good clinical background you can go through the differentials quick and rule out etiologies in your head or make a mental asterisk next to ones that may deserve more workup/research.
★★★★★ In retirement the access to current literature diminished a rapid access in my e-phone.

Found by matching words and phrases in the reviews, not read by a person. A review can count toward more than one theme.

What users say

Latest reviews, Japan App Store.

★★★★★Aug 6, 2026
.

Very useful. Clean clear interface (no barrage of popup ads).

★★★★★Jul 8, 2026
Good

I use it a lot for practicals. They want a differential diagnosis, I can think of many from this app only.

★★★★★Nov 23, 2025
Marginal

Pregnancy is listed as a disease. It is not! Poor app!

★★★★★Aug 24, 2025
Very helpful

For years, I have used Diagnosaurus as an aid in practice and in teaching my medical students.

★★★★★Aug 22, 2024
Do Not Purchase

(Review from NP student) This DDx is greatly lacking in substance and content. Many signs and symptoms are not listed and many differentials are left out.

★★★★★Feb 25, 2023
first line DDx

Useful as a first line differential Dx. after history taking and physical ex.

Store screenshots

ScreenshotScreenshotScreenshotScreenshotScreenshotScreenshotScreenshotScreenshotScreenshotScreenshot

App Store ads

Apple Search Ads this app ran in the last 90 days, from Apple's public ad repository.

Apple's ad repository couldn't be reached right now. Try again later.

Growth research

Where this app is buying and earning its users. Each link opens pre filtered.

Meta Ad Library ↗Active Facebook and Instagram adsTikTok Creative Center ↗Top performing TikTok adsTikTok creators ↗Organic videos mentioning the appInstagram ↗Reels and posts under its hashtagYouTube ↗Reviews, tutorials and ShortsDeveloper site ↗Landing page and pricing

ASO keywords

Most repeated terms in the listing. Highlighted ones also appear in the title.

entries5diagnoses4organ system3see related3related ddx3ddx3professionals2diagnosaurus2quick2differential2quickly2search2organ2system2symptom2disease2see2related2feature2within2favorites2

What's new in 1.15

This update adds support for iPhone Duo and ensures full compatibility with the latest iOS 27 release, delivering a more reliable experience with improved performance and stability. We're always here to help—if you have any questions or feedback, please contact Unbound Medicine Support at support@unboundmedicine.com

Released Mar 19, 2014. Current version shipped Oct 17, 2026.

Store description

** Top-Selling App Used by Tens of Thousands of Health Professionals, Worldwide ** ABOUT DIAGNOSAURUS DDX This quick-reference tool helps healthcare professionals perform differential diagnosis with speed and confidence at the point of care. With Diagnosaurus you can quickly search over 1,000 diagnoses by organ system, symptom, or disease, or you can view all entries. Use the valuable “See Related DDx” feature within each entry to consider alternative diagnoses and quickly link to those entries. The convenient “Favorites” feature allows you to save specific searches and bookmark in your personal archive. FEATURES • More than 1,000 differential diagnoses • Highlight and make custom notes within entries • Entries organized in quick-read format • “See Related DDx” links to other potential diagnoses • Disease, symptom, and organ system indexes • “Favorites” for bookmarking important entries • Universal Index Search to help find answers fast Author: Roni F. Zeiger, MD Publisher: McGraw-Hill Medical Powered by: Unbound Medicine

See this store page in another country

Prices, ranks and reviews are per country. Revenue above is already worldwide.

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