# iGauge vs Duet Display

The clearest difference is rating: Duet Display at 4.4 against iGauge's 2.4. Duet Display also leads on ratings volume (49K vs 17) and review sentiment (45% vs 29%). iGauge's advantage is in-app purchases (none vs 6) and ads (none vs shown). On price and update cadence there is nothing between them.

Both are free to download. Duet Display sells 6 in-app purchases, starting at $3.99 per month. iGauge asks for nothing beyond the download.

Duet Display holds the better App Store score, 4.4 against 2.4. That said, the two scores are not equally well evidenced: Duet Display has 49K ratings behind it against 17, so its average is the more settled of the two. Written reviews point the same way: 29% of iGauge's written reviews are positive against 45% of Duet Display's.

iGauge ships an update every 6 weeks, Duet Display every 3 weeks. The most recent releases landed on October 7, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | iGauge | Duet Display |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.4 (17 ratings)](https://appshunter.io/ios/app/igauge/id793734584/reviews) | **[4.4 (49K ratings)](https://appshunter.io/ios/app/duet-display/id935754064/reviews)** |
| Number of ratings | 17 | **49K** |
| Positive reviews | 29.2% of reviews | **45.5% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 2 MB | 57 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [CO-LUCK ENTERPRISE CO., LTD](https://appshunter.io/developer/1251782804) | [Duet, Inc.](https://appshunter.io/developer/935754063) |

## What reviewers say

### iGauge

[App page](https://appshunter.io/ios/app/igauge/id793734584)

Connect your smart mobile device to i-Gauge pumps via Bluetooth to monitor tire pressure. Supports multiple units and tire types, with battery power detection.

**Highlights:** Bluetooth connectivity to i-Gauge pumps, Supports Mountain, Road & Shock tire molds, Multiple unit support (PSI, BAR, KG/CM²), Battery power detection

**Features:** macOS Compatibility

**In-app purchases:** none


### Duet Display

[App page](https://appshunter.io/ios/app/duet-display/id935754064)

Transform your iPad or iPhone into an advanced, lag-free extra display for your Mac or PC. Interact with your computer using touch and gestures, and unlock professional drawing capabilities with Apple Pencil support.

**Highlights:** Extra display for Mac & PC, Lag-free performance, Touch and gesture support, Apple Pencil integration, Professional drawing tools, Portable productivity

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Duet Starter (Monthly) | $3.99 | per month |
| Duet Air (Monthly) | $5.99 | per month |
| Duet Pro | $7.99 | per month |
| Duet Starter (Annual) | $39.99 | per year |
| Duet Air (Annual) | $49.99 | per year |
| Duet Pro (Annual) | $79.99 | per year |

**What reviewers like**

- 🚀 Works seamlessly as a second screen
- 👍 Useful for productivity and multitasking
- 🎨 Great for artists and designers
- 💻 Extends desktop to iPad
- ⭐ Excellent customer support

**What reviewers complain about**

- 🐛 Connectivity issues and crashes
- 🔋 High battery consumption
- 🔒 Subscription model for full functionality
- 🔍 Confusing setup process
- 💸 Expensive for the features provided

**Reported bugs**

- Incompatibility with certain software and drivers
- Laggy performance and input delays
- Unreliable connection and frequent disconnects

**Requested features**

- Improved resolution and scaling options
- Better support for older devices and Windows
- More customization and control over settings
- Wireless connectivity without subscription


## Frequently asked questions

### Is iGauge free?

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

### Is Duet Display free?

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

### Which has better reviews, iGauge or Duet Display?

Duet Display is rated higher. iGauge averages 2.4 out of 5 from 17 ratings, while Duet Display averages 4.4 from 49K ratings.

### Do iGauge or Duet Display have ads?

Duet Display shows ads; iGauge does not.

### Which is updated more often, iGauge or Duet Display?

iGauge ships an update every 6 weeks, and Duet Display every 3 weeks. Most recently, iGauge was updated on October 7, 2026 and Duet Display on October 18, 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.*