# TracPatch Knee vs Primal's 3D Knee

The clearest difference is in-app purchases: TracPatch Knee at none against Primal's 3D Knee's 1. TracPatch Knee also leads on iOS requirement (13.0 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. TracPatch Knee asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on June 3, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | TracPatch Knee | Primal's 3D Knee |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (9 ratings)](https://appshunter.io/ios/app/tracpatch-knee/id1438219554/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | — |
| Size | 46 MB | 125 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 12+ |
| Developer | [Consensus Orthopedics](https://appshunter.io/developer/1434767853) | [Pharma Intelligence UK Ltd](https://appshunter.io/developer/1678054030) |

## What reviewers say

### TracPatch Knee

[App page](https://appshunter.io/ios/app/tracpatch-knee/id1438219554)

This app provides a smart, connected solution for remote patient monitoring in orthopedics. It captures key daily activities and range of motion to offer healthcare providers real-time insights into patient recovery, enabling proactive care adjustments and improved outcomes.

**Highlights:** Remote patient monitoring, Objective data capture, Predictive outcomes, Continuous activity tracking, Range of motion monitoring, Real-time recovery insights

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 TracPatch Knee free?

TracPatch Knee 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 TracPatch Knee or Primal's 3D Knee have ads?

Neither TracPatch Knee nor Primal's 3D Knee shows ads.

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

TracPatch Knee ships an update every 2 months, and Primal's 3D Knee every 2 months. Most recently, TracPatch Knee was updated on June 3, 2026 and Primal's 3D Knee on September 10, 2026.

---

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