# ARPen vs Builder Lead Converter

The clearest difference is update cadence: Builder Lead Converter at every 2 months against ARPen's every 4 months. ARPen's advantage is iOS requirement (14.2 vs 16.6). 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.

ARPen ships an update every 4 months, Builder Lead Converter every 2 months. The most recent releases landed on October 9, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | ARPen | Builder Lead Converter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.5 (2 ratings)](https://appshunter.io/ios/app/arpen-mid-air-interactions/id1459493311/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 55 MB | 343 MB |
| Requires iOS | **14.2** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [RWTH Aachen University](https://appshunter.io/developer/371466796) | [Builder Lead Converter](https://appshunter.io/developer/1742794784) |

## What reviewers say

### ARPen

[App page](https://appshunter.io/ios/app/arpen-mid-air-interactions/id1459493311)

Create 3D drawings and models in mid-air using a marker or a custom Bluetooth pen. Explore advanced geometry creation, object manipulation, and depth visualization. Export your creations as STL files.

**Highlights:** Draw freehand in mid-air, Create simple and complex geometries, Manipulate objects in 3D space, Explore depth visualization, Export models as STL files, Use marker or custom Bluetooth pen

**Features:** macOS Compatibility

**In-app purchases:** none


### Builder Lead Converter

[App page](https://appshunter.io/ios/app/builder-lead-converter/id6499218613)

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

**In-app purchases:** none


## Frequently asked questions

### Is ARPen free?

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

### Is Builder Lead Converter free?

Builder Lead Converter is free to download, with no in-app purchases.

### Do ARPen or Builder Lead Converter have ads?

Neither ARPen nor Builder Lead Converter shows ads.

### Which is updated more often, ARPen or Builder Lead Converter?

ARPen ships an update every 4 months, and Builder Lead Converter every 2 months. Most recently, ARPen was updated on October 9, 2026 and Builder Lead Converter 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.*