Comparison

Bone Ninja vs 15blades

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

Head to head
About

Bone Ninja

This educational tool helps orthopedic surgeons learn to analyze and correct long bone deformities using digital radiographs. It provides tools for measurement, drawing, and simulating osteotomy solutions, based on established surgical methodology.

Highlights
  • Radiograph analysis of bone deformities
  • Digital measurement and drawing tools
  • Osteotomy simulation with cut-out tool
  • Upload and analyze personal radiographs
  • Comparison with suggested correction solutions
  • Educational tool based on established methodology
Features
Read full description

Bone Ninja is a teaching tool developed by two orthopedic surgeons who specialize in limb deformity correction: Dr. Shawn Standard and Dr. John Herzenberg. It is designed to help surgeons learn to analyze long bone deformities. Bone Ninja comes pre-loaded with radiographs of normal legs and deformed legs. You can analyze the provided cases or upload your own. Once your analysis is complete, you can then use the cut-out tool to try different osteotomy solutions. Suggested solutions for the provided cases are available for comparison. Bone Ninja includes tools for drawing lines, measuring angles, measuring lengths, and calibrating the magnification. The cutting tool allows you to manipulate one or more fragments to simulate correction of single or multilevel deformities. The analysis of the radiographs is based on methodology taught at our annual Baltimore Limb Deformity Course (BLDC), now in its 22nd year (DeformityCourse.com). We developed this app to supplement the BLDC and look forward to feedback from attendees and other users. Bone Ninja is not presented as a clinical tool, but rather an educational tool. It will not “automatically” analyze deformities. The student must first learn the methodology of analyzing and planning deformity correction in order to use Bone Ninja. Bone Ninja is a 21st century mobile alternative to pencil, ruler, goniometer, and paper. Bone Ninja will be periodically updated by adding more case examples, more explanations, and more tools. The name “Bone Ninja” is intentionally whimsical and reflects our philosophy of teaching as “infotainment.” Enjoy! Disclaimer The Bone Ninja App is designed for educational purposes only. The intent is to train physicians how to analyze long bone deformities. The Bone Ninja App is not intended to be used for medical diagnosis or treatment. In view of the possibility of human error or changes in medical science, neither the authors nor the developer warrant that the information contained in this software is accurate or complete and they are not responsible for any errors or omissions or the results obtained from the use of such information.

About

15blades

A peer-to-peer medical education platform using short-form videos and posts for micro-learning. Healthcare professionals can share insights, ask questions, and engage in discussions to advance medical knowledge.

Highlights
  • Micro-learning environment
  • Short-form video and post curation
  • Create posts and polls
  • Share insights and questions
  • Encourage discussions and debates
  • Peer-to-peer knowledge sharing
Features
Read full description

15Blades is a peer to peer medical media educational platform that focuses on micro-learning to keep pace with todays healthcare professional. We have created a micro-learning environment where short form videos and posts are curated for your experience. We welcome healthcare professionals to participate as a life-long student and educator to advance the spread of medical knowledge and discourse. With our app, you can create posts and polls, allowing you to share your insights, questions, and knowledge with your peers. 15Blades also encourages discussions and debates, promoting a deeper understanding of medical concepts. We welcome healthcare professionals to participate as a life-long student and educator to advance the spread of medical knowledge and discourse.

Screenshots

15blades4 screens

Verdict

The call

The clearest difference is price: 15blades at Free against Bone Ninja's $49.99. 15blades also leads on update cadence (every 4 weeks vs every 4 months) and ratings volume (20 vs 3). Bone Ninja's advantage is review sentiment (90% vs 50%) and iOS requirement (8.0 vs 15.0). On rating, 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

15blades is free to download; Bone Ninja costs $49.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for Bone Ninja against 4.8 for 15blades. That said, the two scores are not equally well evidenced: 15blades has 20 ratings behind it against 3, so its average is the more settled of the two. Written reviews are what separate them: 90% of Bone Ninja's written reviews are positive against 50% of 15blades's.

UpkeepUpdate frequency

Bone Ninja ships an update every 4 months, 15blades every 4 weeks. The most recent releases landed on June 4, 2026 and September 20, 2026 respectively.

Scorecard7 real differences · 3 level
Bone Ninja versus 15blades: the parameters behind the verdict, then further details
ParameterBone Ninja15blades
Price$49.99Free — better
Rating4.7 (3 ratings)4.8 (20 ratings) — better
Positive reviews90.0% of reviews — better50.0% of reviews
Number of ratings320 — better
Update frequencyEvery 4 monthsEvery 4 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPadiPhone, iPad, iPod — better
Requires iOS8.0 — better15.0
Further details — not scored
Size34 MB69 MB
Age rating4+12+
DeveloperLifeBridge Health15bladesmedia Inc.

Customer experience

Bone Ninja

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews10 reviews
Positive90.0%
Neutral10.0%
Negative0.0%

15blades

All ratings20 ratings
Positive95.0%
Neutral0.0%
Negative5.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

Bone Ninja

No in-app purchases

None

15blades

No in-app purchases

Questions

Is Bone Ninja free?
Bone Ninja costs $49.99, with no in-app purchases.
Is 15blades free?
15blades is free to download, with no in-app purchases.
Which has better reviews, Bone Ninja or 15blades?
15blades is rated higher. Bone Ninja averages 4.7 out of 5 from 3 ratings, while 15blades averages 4.8 from 20 ratings.
Do Bone Ninja or 15blades have ads?
Neither Bone Ninja nor 15blades shows ads.
Which is updated more often, Bone Ninja or 15blades?
Bone Ninja ships an update every 4 months, and 15blades every 4 weeks. Most recently, Bone Ninja was updated on June 4, 2026 and 15blades on September 20, 2026.

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