CTisus iPearls vs RadCS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Diagnostic radiology pearls
- Thousands of insights
- 28 popular categories
- Search functionality
- Radiologic image understanding
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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.
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.
- Radiology measurements lookup
- Mini-textbook format
- Curated by expert radiologists
- Regular updates
- Educational purposes
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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
Verdict
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
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.
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.
| Parameter | CTisus iPearls | RadCS |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (41 ratings) | 5.0 (6 ratings) — better |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 41 — better | 6 |
| Update frequency | Every 6 months | Every 11 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 137 MB | 67 MB |
| Age rating | 17+ | 12+ |
| Developer | Elliot Fishman | Versive Inc |
Customer experience
CTisus iPearls
RadCS
In-app purchases
CTisus iPearls
No in-app purchases
RadCS
No in-app purchases
Questions
Is CTisus iPearls free?
Is RadCS free?
Which has better reviews, CTisus iPearls or RadCS?
Do CTisus iPearls or RadCS have ads?
Which is updated more often, CTisus iPearls or RadCS?
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