Comparison

CeDAR vs Behind the Knife

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

Head to head
About

CeDAR

This app helps predict the risk and financial impact of wound complications after ventral hernia repair. It uses a mathematical equation based on patient health status to offer individualized outcomes and educational materials about hernias and treatments.

Highlights
  • Predicts postoperative wound complication risks
  • Estimates financial impact of complications
  • Provides individualized patient outcomes
  • Offers educational materials on hernias
  • Calculates risk based on user-answered questions
Features
Read full description

Hernia repairs are among the most common operations performed in the world. Historically, quality was measured almost solely by recurrence rates. Now that routine mesh use has made these repairs much more durable, wound problems after surgery are the major reason for increased cost of surgery, including the added cost of other procedures, hospital stays and clinic visits because of wound problems up to a year after hernia repair. Because of their wounds, these patients often are not able to work and lose time and money because of specialty wound care, travel, clinic visits and/or hospital stays. We believe assessing and understanding a patient's preoperative health status can significantly impact postoperative outcomes. The Carolinas Equation for Determining Associated Risks (CeDAR) predicts the risks and financial impact of wound-related problems following ventral hernia repair. The complex mathematical equation, which was calculated from data taken from patients around the world after their surgery, has been independently tested and found to be accurate and reliable. With the aid of mobile app technology, CeDAR now provides surgeons and patients with a powerful tool that can predict individualized wound outcomes after abdominal hernia surgery. Moreover, it offers patients detailed educational materials about many types of hernias and their treatments. Users simply answer eight questions about themselves, including height and weight. Based on these answers, a percentage chance of developing specific postoperative complications requiring treatment is calculated along with the corresponding cost of this treatment. These results can then be used to discuss an individual patient's risk for wound problems after surgery and what they can change to improve their odds for a good result.

About

Behind the Knife

This platform offers surgical education with high-yield topics and interviews with field leaders. It provides timely, relevant, and engaging content to help users succeed in their medical studies and careers.

Highlights
  • Surgical education platform
  • High-yield educational topics
  • Interviews with field leaders
  • Timely and relevant content
  • Engaging learning experience
Read full description

Behind the Knife is the world’s #1 surgical education platform. From high-yield educational topics to interviews with leaders in the field, Behind the Knife delivers the information you need to know. Enjoy timely, relevant, and engaging content designed to help you DOMINATE THE DAY!

Screenshots

CeDAR4 screens
Behind the Knife4 screens

Verdict

The call

The clearest difference is rating: CeDAR at 5.0 against Behind the Knife's 4.0. CeDAR also leads on iOS requirement (8.0 vs 15.0). Behind the Knife's advantage is update cadence (monthly vs every 18 months) and ratings volume (20 vs 2). On price, ads, in-app purchases and monetization model 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

CeDAR holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: Behind the Knife has 20 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

CeDAR ships an update every 18 months, Behind the Knife monthly. The most recent releases landed on October 12, 2026 and October 25, 2026 respectively.

Scorecard4 real differences · 6 level
CeDAR versus Behind the Knife: the parameters behind the verdict, then further details
ParameterCeDARBehind the Knife
PriceFreeFree
Rating5.0 (2 ratings) — better4.0 (20 ratings)
Positive reviews—58.3% of reviews
Number of ratings220 — better
Update frequencyEvery 18 monthsMonthly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS8.0 — better15.0
Further details — not scored
Size37 MB168 MB
Age rating12+17+
DeveloperCarolinas Surgical Innovation Group, LLCBehind the Knife

Customer experience

CeDAR

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Behind the Knife

All ratings20 ratings
Positive75.0%
Neutral5.0%
Negative20.0%
Written reviews12 reviews
Positive58.3%
Neutral8.3%
Negative33.3%

In-app purchases

None

CeDAR

No in-app purchases

None

Behind the Knife

No in-app purchases

Questions

Is CeDAR free?
CeDAR is free to download, with no in-app purchases.
Is Behind the Knife free?
Behind the Knife is free to download, with no in-app purchases.
Which has better reviews, CeDAR or Behind the Knife?
CeDAR is rated higher. CeDAR averages 5.0 out of 5 from 2 ratings, while Behind the Knife averages 4.0 from 20 ratings.
Do CeDAR or Behind the Knife have ads?
Neither CeDAR nor Behind the Knife shows ads.
Which is updated more often, CeDAR or Behind the Knife?
CeDAR ships an update every 18 months, and Behind the Knife monthly. Most recently, CeDAR was updated on October 12, 2026 and Behind the Knife on October 25, 2026.

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