# FlooPen vs Quad Calcs

The clearest difference is ads: FlooPen at none against Quad Calcs's shown. FlooPen also leads on iOS requirement (13.0 vs 15.8.3). Quad Calcs's advantage is device support (3 vs 1). On price, update cadence and in-app purchases there is nothing between them.

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

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 6, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | FlooPen | Quad Calcs |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/floopen/id1636861716/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Monetization | Free | — |
| Size | 4 MB | 36 MB |
| Requires iOS | **13.0** | 15.8.3 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [RADIOWORKS MICROELECTRONICS PTY LTD](https://appshunter.io/developer/1604794401) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## What reviewers say

### FlooPen

[App page](https://appshunter.io/ios/app/floopen/id1636861716)

This app enables the use of Apple Pencil and finger touch input on Windows devices. It supports advanced Apple Pencil features like altitude and azimuth, with low-latency Bluetooth connectivity for a seamless drawing experience. Inputs remain offline for enhanced privacy.

**Highlights:** Use Apple Pencil on Windows, Finger touch as pen/mouse input, Supports altitude and azimuth, Low-latency Bluetooth connection, Offline input for privacy, Firmware update guidance

**Features:** macOS Compatibility

**In-app purchases:** none


### Quad Calcs

[App page](https://appshunter.io/ios/app/quad-calcs/id6741951453)

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

**In-app purchases:** none


## Frequently asked questions

### Is FlooPen free?

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

### Is Quad Calcs free?

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

### Do FlooPen or Quad Calcs have ads?

Quad Calcs shows ads; FlooPen does not.

### Which is updated more often, FlooPen or Quad Calcs?

FlooPen ships an update every 2 weeks, and Quad Calcs every 2 weeks. Most recently, FlooPen was updated on October 6, 2026 and Quad Calcs on October 4, 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.*