# Duet Air vs HTML Previewer

The clearest difference is price: Duet Air at Free against HTML Previewer's $5.99. Duet Air also leads on iOS requirement (12.0 vs 17.0). HTML Previewer's advantage is in-app purchases (none vs 2) and ads (none vs shown). On device support there is nothing between them.

Duet Air is free to download; HTML Previewer costs $5.99 up front. Duet Air sells 2 in-app purchases, starting at $49.99 per year. HTML Previewer asks for nothing beyond the download.

Duet Air ships an update every 3 weeks, HTML Previewer every 4 days. The most recent releases landed on October 18, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Duet Air | HTML Previewer |
| --- | --- | --- |
| Price | **Free** | $5.99 |
| Rating | **[4.3 (1.9K ratings)](https://appshunter.io/ios/app/duet-air-remote-desktop/id1531326998/reviews)** | — |
| Number of ratings | **1.9K** | — |
| Positive reviews | 23.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Monetization | Subscription | — |
| Best chart rank | — | **#192** |
| Size | 67 MB | 9 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Duet, Inc.](https://appshunter.io/developer/935754063) | [SHIFENG ZHANG](https://appshunter.io/developer/1886637404) |

## What reviewers say

### Duet Air

[App page](https://appshunter.io/ios/app/duet-air-remote-desktop/id1531326998)

Transform your iPad or iPhone into an advanced remote desktop or an extra display for your Mac or PC. Experience unparalleled performance and zero lag, with touch and gesture support. Offers professional-grade drawing capabilities with Apple Pencil integration for artists and designers.

**Highlights:** Remote desktop functionality, Extra display for Mac/PC, Touch and gesture support, Apple Pencil integration for drawing, Wireless and wired connectivity, Zero lag performance

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Duet Air (Annual) | $49.99 | per year |
| Duet Pro (Annual) | $79.99 | per year |

**What reviewers like**

- 🚀 Smooth performance
- 👍 Easy to set up
- 💡 Useful as a second screen
- 🚀 Zero lag
- 👍 Fantastic app

**What reviewers complain about**

- 🐛 Inconsistent connectivity
- 🐛 Buggy and unstable
- 💰 Expensive subscription
- 🐛 Laggy and low resolution
- 🐛 Crashes and freezes

**Reported bugs**

- Incompatible with Citrix
- Breaks Windows network
- Bricked user's PC
- Login screen issues
- Inconsistent performance

**Requested features**

- Support for older devices
- Improve wireless stability
- Add audio support
- Better integration with drawing apps
- Easier subscription cancellation


### HTML Previewer

[App page](https://appshunter.io/ios/app/html-previewer/id6785794966)

**Currently charting:** #192 Top Paid · Productivity (US App Store)

**In-app purchases:** none


## Frequently asked questions

### Is Duet Air free?

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

### Is HTML Previewer free?

HTML Previewer costs $5.99, with no in-app purchases.

### Do Duet Air or HTML Previewer have ads?

Duet Air shows ads; HTML Previewer does not.

### Which is updated more often, Duet Air or HTML Previewer?

Duet Air ships an update every 3 weeks, and HTML Previewer every 4 days. Most recently, Duet Air was updated on October 18, 2026 and HTML Previewer on October 11, 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.*