# CJOrtho vs Bone Ninja Sensei

The clearest difference is review sentiment: CJOrtho at 75% against Bone Ninja Sensei's 25%. CJOrtho also leads on in-app purchases (none vs 1). Bone Ninja Sensei's advantage is iOS requirement (11.4 vs 16.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Bone Ninja Sensei sells 1 in-app purchase, starting at $14.99 per year. CJOrtho asks for nothing beyond the download.

CJOrtho ships an update every 6 months, Bone Ninja Sensei every 3 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | CJOrtho | Bone Ninja Sensei |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.7 (3 ratings)](https://appshunter.io/ios/app/bone-ninja-sensei/id6450483301/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | **75.0% of reviews** | 25.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 72 MB | 48 MB |
| Requires iOS | 16.0 | **11.4** |
| Devices | **iPhone, iPad** | iPad |
| Age rating | 17+ | 4+ |
| Developer | [Collège des Jeunes Orthopédistes](https://appshunter.io/developer/937704597) | [LifeBridge Health](https://appshunter.io/developer/460335164) |

## What reviewers say

### CJOrtho

[App page](https://appshunter.io/ios/app/cjortho/id937704598)

This medical app assists orthopedic surgeons and health professionals in managing patients with musculoskeletal disorders. It offers tools for clinical evaluation, decision support, and pre- and post-operative follow-up, including classifications, clinical scores, and a goniometer.

**Highlights:** Orthopedic classifications, Clinical scores by joint, Goniometer tool, Patient database, Procedure progress tracking, Pre- and post-operative follow-up

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Bone Ninja Sensei

[App page](https://appshunter.io/ios/app/bone-ninja-sensei/id6450483301)

This educational tool, created by orthopedic surgeons, helps medical professionals learn to analyze long bone deformities. It provides tools for drawing, measuring, and simulating osteotomy solutions on provided or uploaded radiographs.

**Highlights:** Analyze long bone deformities, Radiograph analysis tools, Simulate osteotomy solutions, Upload custom radiographs, Drawing and measuring tools, Educational case examples

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Annual Subscription Plan | $14.99 | per year |


## Frequently asked questions

### Is CJOrtho free?

CJOrtho is free to download, with no in-app purchases.

### Is Bone Ninja Sensei free?

Bone Ninja Sensei is free to download, with in-app purchases available.

### Do CJOrtho or Bone Ninja Sensei have ads?

Neither CJOrtho nor Bone Ninja Sensei shows ads.

### Which is updated more often, CJOrtho or Bone Ninja Sensei?

CJOrtho ships an update every 6 months, and Bone Ninja Sensei every 3 months. Most recently, CJOrtho was updated on October 24, 2026 and Bone Ninja Sensei on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*