← Back to charts
Clinical Lab Science Review icon
APP STORE

Clinical Lab Science Review

Tot Dojo LLC · Education · United States store
NOT IN TOP 100 HERE
View on App Store ↗ Instagram card
Revenue a month, worldwide EST
$276
Likely $92 to $827
▲ 22.4% in 9 days
New ratings
+0
in 1 days, 23 in total
Rating
4.8 of 5
22 ratings in this store
Countries it ranks in
0
was 0 on Oct 20, 2026

Revenue

Estimated from the grossing charts of Oct 26, 2026 in the 53 countries we track, and ratings growth on the App Store.

EST. REVENUE / YEAR · WORLDWIDE
$3.3K
0.2 new ratings a month on average since launch
EST. LIFETIME DOWNLOADS
770 to 2.2K
Estimated from ratings count
WHERE ITS USERS ARE · SHARE OF RATINGS
  • United States 22 ratings96%
  • Canada 1 ratings4%
HOW SURE ARE WE
Not in any grossing chart, so this comes from ratings growth (0.2 new ratings a month on average since launch): revenue grows with new ratings, more slowly for apps that collect ratings fast. Tested on 418 apps with verified revenue: typically off by about 2 times, and big earners tend to come out low. Countries we don't track (and Google Play in China, which doesn't exist) aren't included, and neither are ads or web payments. Gross revenue before store fees.
RATINGS
22
AVG RATING
4.82
PRICE
Free
AGE
9.5y
LAST UPDATE
293d ago
VERSION
2.2.0
SIZE
62 MB
AGE RATING
4+

Last 30 days

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

DAYS IN A GROSSING CHART
3 / 30
COUNTRIES NOW
0 (was 0)
NEW RATINGS, LAST 1 DAYS
+0
EST. REVENUE A MONTH, DAILY · APP STORE EST
Show daily values
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, 2026$819 a month
Oct 10, 2026not in a grossing chart
Oct 11, 2026not in a grossing chart
Oct 12, 2026$943 a month
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, 2026$1.2K a month
Oct 22, 2026not in a grossing chart
Oct 23, 2026not in a grossing chart
Oct 24, 2026not in a grossing chart
Oct 25, 2026not in a grossing chart
Oct 26, 2026not in a grossing chart
Oct 27, 2026not in a grossing chart
The same estimate as the headline, saved every day. Best rank Sep 28, 2026: not ranked. Now: not ranked.
RATINGS IN THE CORE COUNTRIES, DAILY
Show daily values
Oct 22, 202623 ratings
Oct 23, 202623 ratings
23 on Oct 22, 2026, 23 on Oct 23, 2026. New ratings track new downloads, even outside the charts.

Money and momentum

Measured from the store, not estimated.

WHAT IT CHARGES
1 purchase listed
  • Clinical Lab Science Review - Full Version$39.99
Top in-app purchases as listed on the App Store, in local prices.
REVIEW MOMENTUM
0.0 reviews / week
  • Recent reviews average2.9 stars
  • Recent 1 and 2 star share53%
From the latest 17 written reviews, covering 3097 days.
RELEASE CADENCE
0 updates in 90 days
  • Typical gap between releases92 days
From the last 12 versions listed on the App Store.
RATING BREAKDOWN
22 ratings
5★95%
4★0%
3★0%
2★0%
1★5%

What users want

From the latest 17 reviews on the United States App Store, May 5, 2018 to Mar 3, 2026: 53% are 1 or 2 stars. Open a theme to read what people wrote.

WHAT THEY COMPLAIN ABOUT · SHARE OF BAD REVIEWS
Crashes and freezes44%

4 of the 1 and 2 star reviews.

★★★★★ Purchased upgrade but app opens up to a white screen. Won't allow me to proceed after purchase.
★★★★★ iPad crashes every time I try to increase the number of questions greater than 10.
★★★★★ iPad crashes every time I try to increase the number of questions greater than 10.
Price and subscription44%

4 of the 1 and 2 star reviews.

★★★★★ The upgrade part Is a scam .
★★★★★ I love the idea but I want to be doing more complex level 2 and 3 questions if I'm going to pay this much money.
★★★★★ This app is great for doing questions on the go. Some of the explanations contain memory devices which I also found helpful. That being said, the questions were really repetitive and way too basic compared to what I…
WHAT THEY ASK FOR
  • This app would be great if it was $10. 2★, Jun 12, 2022
WORDS THAT KEEP COMING UP IN BAD REVIEWS

Nothing stands out.

WHAT THEY LOVE · SHARE OF GOOD REVIEWS
Useful, it helps50%

4 of the 4 and 5 star reviews.

★★★★★ This app helps and prepares you for any lab science exam!
★★★★★ This app is very helpful in studying for the ASCP
★★★★★ It's easy to use everywhere and it's very helpful ...

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, United States App Store.

★★★★★Mar 3, 2026
A great study tool!

This app helps and prepares you for any lab science exam! I love the ease of navigating the app and the aesthetic! Info and explanations are so helpful! Thank you to the CLS team!

★★★★★Jun 25, 2024
Scam , don't upgrade

I upgraded the app for $39.99 , a week ago and it has not upgraded yet!!. The upgrade part Is a scam .

★★★★★Jan 22, 2024
Doesn’t open

Purchased upgrade but app opens up to a white screen. Won’t allow me to proceed after purchase.

★★★★★Apr 27, 2023
Didn’t help

This is app not helping so don’t buy it!!

★★★★★Jan 1, 2023
So far not a bad tool to have on the go!

Like the title says, I’m not carrying a review book around with me everywhere I go while I prep for my boards so this is an excellent way to review Note: a few small issues on my end: The subscript 2 for BB (ie R2r1) doesn’t show clearly, looks like a zero And there is a question regarding how long plasma has to be frozen, the wording needs to be more specific (PF24 vs FFP) Otherwise certainly a great tool to use

★★★★★Nov 2, 2022
Great concept but very repetitive, just basic questions, and way too expensive

I love the idea but I want to be doing more complex level 2 and 3 questions if I’m going to pay this much money. Love the idea but right now would not recommend buying this for students.

Apps like this

Same category, earning about as much.

Pakistan Law Bot$274 a month ESTSkyView®$287 a month ESTScientific Calculator Plus 991$257 a month ESTToca Hair Salon 2$316 a month ESTJetmav$323 a month ESTAshtar - أشطر$337 a month ESTYaqeenKids$338 a month ESTSimulacro MTC: Aprueba Ahora$355 a month EST

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.

clinical laboratory5clinical4laboratory4laboratory scientists3laboratory science3cls3review3exam3scientists2medical2mls2ascp2knowledge2science2

What's new in 2.2.0

Brand new user interface, dark mode, enhanced image zoom, bug fixes.

Released May 16, 2017. Current version shipped Jan 6, 2026.

Store description

CLS Review is a quiz style review app for clinical laboratory scientists (CLS), medical laboratory scientists (MLS), and medical technologists (MT) preparing for the ASCP or ASCPi exam. • 900+ targeted questions and detailed explanations covering all areas of the clinical lab: hematology, coagulation, microbiology, chemistry, urinalysis, blood bank, mycology, immunology, and more! • Learn new material, reinforce and solidify concepts, and put your knowledge to the test. • Study on the go, anywhere in the world, without lugging around review books and flash cards. • Guaranteed to boost your conceptual knowledge of clinical laboratory science and improve your exam score. • Pass the clinical laboratory science ASCP exam (CLS/MLS/MT) the first time!

See this store page in another country

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

United KingdomGermanyJapanBrazilIndia

More from Tot Dojo LLC

Logic Dogs
Games		0 ratingsAnalyze →