# Bone Ninja Sensei vs 15blades

The clearest difference is rating: 15blades at 4.8 against Bone Ninja Sensei's 3.7. 15blades also leads on in-app purchases (none vs 1) and review sentiment (50% vs 25%). Bone Ninja Sensei's advantage is iOS requirement (11.4 vs 15.0). On price and ads there is nothing between them.

Both are free to download. Bone Ninja Sensei sells 1 in-app purchase, starting at $14.99 per year. 15blades asks for nothing beyond the download.

15blades holds the better App Store score, 4.8 against 3.7. 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 point the same way: 25% of Bone Ninja Sensei's written reviews are positive against 50% of 15blades's.

Bone Ninja Sensei ships an update every 3 months, 15blades every 4 weeks. Both last shipped on November 3, 2026.

## The numbers

| Metric | Bone Ninja Sensei | 15blades |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (3 ratings)](https://appshunter.io/ios/app/bone-ninja-sensei/id6450483301/reviews) | **[4.8 (20 ratings)](https://appshunter.io/ios/app/15blades/id6465287425/reviews)** |
| Number of ratings | 3 | **20** |
| Positive reviews | 25.0% of reviews | **50.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 48 MB | 69 MB |
| Requires iOS | **11.4** | 15.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [LifeBridge Health](https://appshunter.io/developer/460335164) | [15bladesmedia Inc.](https://appshunter.io/developer/1652063001) |

## What reviewers say

### 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 |


### 15blades

[App page](https://appshunter.io/ios/app/15blades/id6465287425)

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:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Bone Ninja Sensei free?

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

### Is 15blades free?

15blades is free to download, with no in-app purchases.

### Which has better reviews, Bone Ninja Sensei or 15blades?

15blades is rated higher. Bone Ninja Sensei averages 3.7 out of 5 from 3 ratings, while 15blades averages 4.8 from 20 ratings.

### Do Bone Ninja Sensei or 15blades have ads?

Neither Bone Ninja Sensei nor 15blades shows ads.

### Which is updated more often, Bone Ninja Sensei or 15blades?

Bone Ninja Sensei ships an update every 3 months, and 15blades every 4 weeks. Most recently, Bone Ninja Sensei was updated on November 3, 2026 and 15blades on November 3, 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.*