# My Knee Guide vs Primal's 3D Knee

The clearest difference is in-app purchases: My Knee Guide at none against Primal's 3D Knee's 1. My Knee Guide also leads on iOS requirement (6.1 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Primal's 3D Knee sells 1 one-off in-app purchase. My Knee Guide asks for nothing beyond the download.

My Knee Guide ships an update every 6 weeks, Primal's 3D Knee every 2 months. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | My Knee Guide | Primal's 3D Knee |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (70 ratings)](https://appshunter.io/ios/app/my-knee-guide/id614808450/reviews)** | — |
| Number of ratings | **70** | — |
| Positive reviews | 84.9% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | Free | — |
| Size | 53 MB | 125 MB |
| Requires iOS | **6.1** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Empire Digital, LLC](https://appshunter.io/developer/614808453) | [Pharma Intelligence UK Ltd](https://appshunter.io/developer/1678054030) |

## What reviewers say

### My Knee Guide

[App page](https://appshunter.io/ios/app/my-knee-guide/id614808450)

This app provides a personalized guide for individuals undergoing knee replacement surgery. It offers a customizable calendar with reminders, educational resources, and a directory of healthcare providers and facilities with ratings. Users can also find support through shared patient stories.

**Highlights:** Personalized surgery calendar, Safety notifications and reminders, Directory of healthcare providers and facilities, Patient ratings and safety information, Educational content on knee arthritis and treatment, Animated x-ray visualizations of surgery, Pre- and post-operative checklists

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Very informative app
- 👍 Great for pre and post-surgery
- 👍 Reassuring and helpful
- 👍 Keeps users on track
- 👍 Provides questions to ask doctors

**What reviewers complain about**

- 🐛 Outdated information
- 🐛 Poorly designed and outdated interface
- 🐛 Cannot join directly from app
- 🐛 Cannot enter customized details
- 🐛 Inaccurate expectations for some practices

**Reported bugs**

- App won't open
- Cannot log in
- Cannot create an account
- Cannot sign in as guest
- Account doesn't exist error

**Requested features**

- Add website registration prompt on opening page
- Specify frequency for exercises
- Mention importance of straightness in exercises


### Primal's 3D Knee

[App page](https://appshunter.io/ios/app/primals-3d-knee/id1658547427)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Primal's 3D Knee | $39.99 | one-time |


## Frequently asked questions

### Is My Knee Guide free?

My Knee Guide is free to download, with no in-app purchases.

### Is Primal's 3D Knee free?

Primal's 3D Knee is free to download, with in-app purchases available.

### Do My Knee Guide or Primal's 3D Knee have ads?

Neither My Knee Guide nor Primal's 3D Knee shows ads.

### Which is updated more often, My Knee Guide or Primal's 3D Knee?

My Knee Guide ships an update every 6 weeks, and Primal's 3D Knee every 2 months. Most recently, My Knee Guide was updated on October 29, 2026 and Primal's 3D Knee on October 25, 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.*