# IR vs IR master

The clearest difference is update cadence: IR master at every 3 months against IR's every 7 months. IR's advantage is iOS requirement (9.0 vs 13.0). 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.

IR ships an update every 7 months, IR master every 3 months. The most recent releases landed on September 27, 2026 and July 7, 2026 respectively.

## The numbers

| Metric | IR | IR master |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.7 (3 ratings)](https://appshunter.io/ios/app/ir-master/id1614218116/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 26.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 months** |
| Monetization | — | Free |
| Size | 47 MB | 77 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [凯兴 莫](https://appshunter.io/developer/1120890137) | [InfiRay Technologies Co.,Ltd.](https://appshunter.io/developer/1516230719) |

## What reviewers say

### IR

[App page](https://appshunter.io/ios/app/ir-tracker/id1120890138)

**Features:** macOS Compatibility

**In-app purchases:** none


### IR master

[App page](https://appshunter.io/ios/app/ir-master/id1614218116)

This application transforms your smartphone into a high-resolution infrared thermal imager. It offers detailed temperature data output for various applications, from industrial inspections to personal health monitoring.

**Highlights:** High-resolution infrared thermal imaging, Real-time temperature data output, Wide range of application directions, Consumer-level infrared thermography, Night vision capabilities

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is IR free?

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

### Is IR master free?

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

### Do IR or IR master have ads?

Neither IR nor IR master shows ads.

### Which is updated more often, IR or IR master?

IR ships an update every 7 months, and IR master every 3 months. Most recently, IR was updated on September 27, 2026 and IR master on July 7, 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.*