# IR master vs NV Master

The clearest difference is update cadence: NV Master at every 3 weeks against IR master's every 3 months. 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 master ships an update every 3 months, NV Master every 3 weeks. The most recent releases landed on July 7, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | IR master | NV 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 3 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 77 MB | 46 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [InfiRay Technologies Co.,Ltd.](https://appshunter.io/developer/1516230719) | [Thermal Master Technology Co.,Ltd.](https://appshunter.io/developer/1770222118) |

## What reviewers say

### 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


### NV Master

[App page](https://appshunter.io/ios/app/nv-master/id6544784038)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is IR master free?

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

### Is NV Master free?

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

### Do IR master or NV Master have ads?

Neither IR master nor NV Master shows ads.

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

IR master ships an update every 3 months, and NV Master every 3 weeks. Most recently, IR master was updated on July 7, 2026 and NV Master on September 12, 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.*