# IR master vs Thermal P2

The clearest difference is rating: IR master at 3.7 against Thermal P2's 2.1. IR master also leads on monetization model (free vs paid) and review sentiment (27% vs 11%). Thermal P2's advantage is update cadence (fortnightly vs every 3 months) and ratings volume (27 vs 3). 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 holds the better App Store score, 3.7 against 2.1. That said, the two scores are not equally well evidenced: Thermal P2 has 27 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 27% of IR master's written reviews are positive against 11% of Thermal P2's.

IR master ships an update every 3 months, Thermal P2 fortnightly. Both last shipped on September 29, 2026.

## The numbers

| Metric | IR master | Thermal P2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/ir-master/id1614218116/reviews)** | [2.1 (27 ratings)](https://appshunter.io/ios/app/thermal-p2/id6446384113/reviews) |
| Number of ratings | 3 | **27** |
| Positive reviews | **26.7% of reviews** | 10.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | **Free** | Paid |
| Size | 77 MB | 19 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [InfiRay Technologies Co.,Ltd.](https://appshunter.io/developer/1516230719) | [Raysen Microsystem Technology Co., Ltd.](https://appshunter.io/developer/1738384120) |

## 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


### Thermal P2

[App page](https://appshunter.io/ios/app/thermal-p2/id6446384113)

This professional thermal camera connects to your smartphone for plug-and-play temperature measurement. It's ideal for both personal and industrial use, from inspecting household utilities to diagnosing equipment issues.

**Highlights:** Ultra-small professional thermal camera, 12μm high-performance infrared detector, Self-developed ASIC chip, Compact size, lightweight, low power consumption, Plug-and-play smartphone connection, Accurate temperature measurement, Heat map analysis

**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 Thermal P2 free?

Thermal P2 is free to download, with no in-app purchases.

### Which has better reviews, IR master or Thermal P2?

IR master is rated higher. IR master averages 3.7 out of 5 from 3 ratings, while Thermal P2 averages 2.1 from 27 ratings.

### Do IR master or Thermal P2 have ads?

Neither IR master nor Thermal P2 shows ads.

### Which is updated more often, IR master or Thermal P2?

IR master ships an update every 3 months, and Thermal P2 fortnightly. Most recently, IR master was updated on September 29, 2026 and Thermal P2 on September 29, 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.*