Comparison

CTisus iPearls vs RadCS

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

Head to head
About

CTisus iPearls

This app provides diagnostic radiologists with valuable insights and facts, known as "pearls," to aid in correct diagnoses and understanding of radiologic images. It organizes these pearls across 28 popular categories and includes a search feature for easy access to thousands of pieces of knowledge.

Highlights
  • Diagnostic radiology pearls
  • Thousands of insights
  • 28 popular categories
  • Search functionality
  • Radiologic image understanding
Features
Read full description

To most people, pearls are considered precious gems, and are among the most popular jewels in the world. It should not be surprising that physicians consider a priceless bit of knowledge about their specialty a "pearl". For the diagnostic radiologist, a pearl may be the formerly elusive insight or fact that paves the way for a correct diagnosis or deeper understanding of a radiologic image. A traditional component of radiology education, pearls are considered on a par with elements such as the teaching file or lecture series. Pearls have also been a mainstay of www.CTISUS.com, where we post approximately 150 to 300 new pearls each month. In this app, we present pearls across 29 of the most popular categories derived from the literature or our imaging experiences. The app also provides a search feature to enhance user interactivity. We look forward to sharing these new insights with you on the latest version where we present literally thousands of pearls.

About

RadCS

Provides quick access to essential measurements and numbers used in radiology practice. Serves as a mini-textbook for medical professionals. Content is curated by board-certified radiologists.

Highlights
  • Radiology measurements lookup
  • Mini-textbook format
  • Curated by expert radiologists
  • Regular updates
  • Educational purposes
Features
Read full description

This app RadCS has been created for at-hand look up of or as a mini-textbook for important measurements and numbers that we commonly use in radiology practice. Editor-in-chief Dr. Shyam Sabat. Contributors: Dr. Dhanashree Rajdekar, Dr. Abdullah M., Dr. Andrew Blum, Dr. Troy Storey, Dr. Cooper Dean, and others). DISCLAIMER: Versive Inc, developers of the app, have no independent medical expertise and make no claims as to the veracity of this content. The Board Certified sub-specialty radiologists creating the app have extensive medical expertise, and update this app whenever information or direction is known to change. Notwithstanding, all users of this app, medical professionals or otherwise are fully responsible for their use or application of information contained herein. The contents are intended to be used for educational purposes only and the authors/editors do not claim copyright over the contents.

Screenshots

CTisus iPearls4 screens
RadCS3 screens

Verdict

The call

The clearest difference is update cadence: RadCS at every 11 days against CTisus iPearls's every 6 months. RadCS also leads on rating (5.0 vs 4.7) and iOS requirement (12.0 vs 15.6). CTisus iPearls's advantage is ratings volume (41 vs 6). On price, review sentiment, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

RadCS holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: CTisus iPearls has 41 ratings behind it against 6, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

CTisus iPearls ships an update every 6 months, RadCS every 11 days. The most recent releases landed on October 21, 2026 and October 10, 2026 respectively.

Scorecard4 real differences · 6 level
CTisus iPearls versus RadCS: the parameters behind the verdict, then further details
ParameterCTisus iPearlsRadCS
PriceFreeFree
Rating4.7 (41 ratings)5.0 (6 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings41 — better6
Update frequencyEvery 6 monthsEvery 11 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.612.0 — better
Further details — not scored
Size137 MB67 MB
Age rating17+12+
DeveloperElliot FishmanVersive Inc

Customer experience

CTisus iPearls

All ratings39 ratings
Positive92.3%
Neutral0.0%
Negative7.7%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

RadCS

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

CTisus iPearls

No in-app purchases

None

RadCS

No in-app purchases

Questions

Is CTisus iPearls free?
CTisus iPearls is free to download, with no in-app purchases.
Is RadCS free?
RadCS is free to download, with no in-app purchases.
Which has better reviews, CTisus iPearls or RadCS?
RadCS is rated higher. CTisus iPearls averages 4.7 out of 5 from 41 ratings, while RadCS averages 5.0 from 6 ratings.
Do CTisus iPearls or RadCS have ads?
Neither CTisus iPearls nor RadCS shows ads.
Which is updated more often, CTisus iPearls or RadCS?
CTisus iPearls ships an update every 6 months, and RadCS every 11 days. Most recently, CTisus iPearls was updated on October 21, 2026 and RadCS on October 10, 2026.

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