# Merz Data collection vs Marking3D

The clearest difference is in-app purchases: Merz Data collection at none against Marking3D's 2. Merz Data collection also leads on ads (none vs shown). Marking3D's advantage is update cadence (every 8 days vs every 4 weeks) and iOS requirement (15.6 vs 17.0). On price and device support there is nothing between them.

Both are free to download. Marking3D sells 2 in-app purchases, starting at $89.99 per month. Merz Data collection asks for nothing beyond the download.

Merz Data collection ships an update every 4 weeks, Marking3D every 8 days. The most recent releases landed on September 20, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Merz Data collection | Marking3D |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 weeks | **Every 8 days** |
| Size | 215 MB | 141 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [NextMotion](https://appshunter.io/developer/1092580104) | [Augmented Anatomy](https://appshunter.io/developer/1492251958) |

## What reviewers say

### Merz Data collection

[App page](https://appshunter.io/ios/app/merz-data-collection/id1627104858)

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

**In-app purchases:** none


### Marking3D

[App page](https://appshunter.io/ios/app/marking3d/id6737849427)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basic One Month | $89.99 | per month |
| Basic One Year | $899.00 | per year |


## Frequently asked questions

### Is Merz Data collection free?

Merz Data collection is free to download, with no in-app purchases.

### Is Marking3D free?

Marking3D is free to download, with in-app purchases available.

### Do Merz Data collection or Marking3D have ads?

Marking3D shows ads; Merz Data collection does not.

### Which is updated more often, Merz Data collection or Marking3D?

Merz Data collection ships an update every 4 weeks, and Marking3D every 8 days. Most recently, Merz Data collection was updated on September 20, 2026 and Marking3D on September 21, 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.*