# ISL Light vs Duet Air

The clearest difference is rating: Duet Air at 4.3 against ISL Light's 2.5. Duet Air also leads on update cadence (every 3 weeks vs every 4 months) and ratings volume (1.9K vs 25). ISL Light's advantage is in-app purchases (none vs 2) and ads (none vs shown). On price, review sentiment and device support there is nothing between them.

Both are free to download. Duet Air sells 2 in-app purchases, starting at $49.99 per year. ISL Light asks for nothing beyond the download.

Duet Air holds the better App Store score, 4.3 against 2.5. That said, the two scores are not equally well evidenced: Duet Air has 1.9K ratings behind it against 25, so its average is the more settled of the two. Written reviews complicate that: 31% of ISL Light's written reviews are positive against 24% of Duet Air's, so the app with the better star average is not the one people write more warmly about.

ISL Light ships an update every 4 months, Duet Air every 3 weeks. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | ISL Light | Duet Air |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.5 (25 ratings)](https://appshunter.io/ios/app/isl-light/id427579815/reviews) | **[4.3 (1.9K ratings)](https://appshunter.io/ios/app/duet-air-remote-desktop/id1531326998/reviews)** |
| Number of ratings | 25 | **1.9K** |
| Positive reviews | **31.3% of reviews** | 23.8% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | **Free with in-app purchases** | Subscription |
| Size | 25 MB | 67 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ISL Online](https://appshunter.io/developer/406473673) | [Duet, Inc.](https://appshunter.io/developer/935754063) |

## What reviewers say

### ISL Light

[App page](https://appshunter.io/ios/app/isl-light/id427579815)

This app allows you to share your iOS device's screen for remote technical support or to control Windows, Mac, or Linux computers from your iPhone or iPad. It offers secure, real-time access and control for both receiving and providing assistance.

**Highlights:** iOS screen sharing, Remote computer control, Unattended computer access, Real-time screen viewing, AES 256-bit encryption, Text chat with users

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is ISL Light free?

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

### Is Duet Air free?

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

### Which has better reviews, ISL Light or Duet Air?

Duet Air is rated higher. ISL Light averages 2.5 out of 5 from 25 ratings, while Duet Air averages 4.3 from 1.9K ratings.

### Do ISL Light or Duet Air have ads?

Duet Air shows ads; ISL Light does not.

### Which is updated more often, ISL Light or Duet Air?

ISL Light ships an update every 4 months, and Duet Air every 3 weeks. Most recently, ISL Light was updated on November 1, 2026 and Duet Air on November 3, 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.*