# eCMID CPD vs 3D Trackviewer

The clearest difference is update cadence: eCMID CPD at every 4 weeks against 3D Trackviewer's every 5 months. 3D Trackviewer's advantage is iOS requirement (11.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

eCMID CPD ships an update every 4 weeks, 3D Trackviewer every 5 months. The most recent releases landed on October 10, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | eCMID CPD | 3D Trackviewer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Every 5 months |
| Size | 33 MB | 98 MB |
| Requires iOS | 15.1 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [eDOT Solutions](https://appshunter.io/developer/1198913065) | [Forest Group (Nederland) B.V.](https://appshunter.io/developer/1453868153) |

## What reviewers say

### eCMID CPD

[App page](https://appshunter.io/ios/app/ecmid-cpd/id1403765535)

**Features:** macOS Compatibility

**In-app purchases:** none


### 3D Trackviewer

[App page](https://appshunter.io/ios/app/3d-trackviewer/id1570600982)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is eCMID CPD free?

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

### Is 3D Trackviewer free?

3D Trackviewer is free to download, with no in-app purchases.

### Do eCMID CPD or 3D Trackviewer have ads?

Neither eCMID CPD nor 3D Trackviewer shows ads.

### Which is updated more often, eCMID CPD or 3D Trackviewer?

eCMID CPD ships an update every 4 weeks, and 3D Trackviewer every 5 months. Most recently, eCMID CPD was updated on October 10, 2026 and 3D Trackviewer on October 9, 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.*