# ParoScan 3Di vs Douglas 3D Sizing

The clearest difference is in-app purchases: Douglas 3D Sizing at none against ParoScan 3Di's 1. Douglas 3D Sizing also leads on device support (3 vs 1). ParoScan 3Di's advantage is update cadence (every 9 days vs every 2 months). On price, ads and iOS requirement there is nothing between them.

Both are free to download. ParoScan 3Di sells 1 in-app purchase, starting at $40.99 per month. Douglas 3D Sizing asks for nothing beyond the download.

ParoScan 3Di ships an update every 9 days, Douglas 3D Sizing every 2 months. The most recent releases landed on October 25, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | ParoScan 3Di | Douglas 3D Sizing |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 2 months |
| Size | 82 MB | 126 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [Paromed GmbH & Co KG](https://appshunter.io/developer/1501299173) | [TechMed 3D](https://appshunter.io/developer/964196047) |

## What reviewers say

### ParoScan 3Di

[App page](https://appshunter.io/ios/app/paroscan-3di/id1501299174)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ParoScan Monthly Subscription | $40.99 | per month |


### Douglas 3D Sizing

[App page](https://appshunter.io/ios/app/douglas-3d-sizing/id1593445668)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ParoScan 3Di free?

ParoScan 3Di is free to download, with in-app purchases available.

### Is Douglas 3D Sizing free?

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

### Do ParoScan 3Di or Douglas 3D Sizing have ads?

Neither ParoScan 3Di nor Douglas 3D Sizing shows ads.

### Which is updated more often, ParoScan 3Di or Douglas 3D Sizing?

ParoScan 3Di ships an update every 9 days, and Douglas 3D Sizing every 2 months. Most recently, ParoScan 3Di was updated on October 25, 2026 and Douglas 3D Sizing on October 27, 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.*