# Thermal Master vs FNIRSI+

The clearest difference is rating: Thermal Master at 2.7 against FNIRSI+'s 1.0. Thermal Master also leads on ratings volume (19 vs 1). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Thermal Master holds the better App Store score, 2.7 against 1.0. That said, the two scores are not equally well evidenced: Thermal Master has 19 ratings behind it against 1, so its average is the more settled of the two.

Thermal Master ships an update every 3 weeks, FNIRSI+ monthly. Both last shipped on October 25, 2026.

## The numbers

| Metric | Thermal Master | FNIRSI+ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.7 (19 ratings)](https://appshunter.io/ios/app/thermal-master/id6737389515/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/fnirsi-plus/id6758704908/reviews) |
| Number of ratings | **19** | 1 |
| Positive reviews | 30.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free | Free |
| Size | 191 MB | 40 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Thermal Master Technology Co.,Ltd.](https://appshunter.io/developer/1770222118) | [Shenzhen FNIRSI Technology Co., Ltd.](https://appshunter.io/developer/1668707317) |

## What reviewers say

### Thermal Master

[App page](https://appshunter.io/ios/app/thermal-master/id6737389515)

This utility app connects to specific thermal camera models, offering enhanced thermal imaging capabilities. It features an upgraded algorithm for clearer heat source detection and supports digital zoom for precise target identification. The app provides lifetime free software upgrades.

**Highlights:** Connects to P, X, DV, and T2Max series thermal cameras, Upgraded Insight+ algorithm for noise suppression, Enhanced heat source visibility, Up to 15x digital zoom, Lifetime free software upgrades

**In-app purchases:** none


### FNIRSI+

[App page](https://appshunter.io/ios/app/fnirsi-plus/id6758704908)

This application allows users to control and manage specific equipment. It provides a straightforward and efficient user experience for device interaction.

**Highlights:** Equipment control, Device management, Fast user experience, Simple interface

**In-app purchases:** none


## Frequently asked questions

### Is Thermal Master free?

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

### Is FNIRSI+ free?

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

### Which has better reviews, Thermal Master or FNIRSI+?

Thermal Master is rated higher. Thermal Master averages 2.7 out of 5 from 19 ratings, while FNIRSI+ averages 1.0 from 1 ratings.

### Do Thermal Master or FNIRSI+ have ads?

Neither Thermal Master nor FNIRSI+ shows ads.

### Which is updated more often, Thermal Master or FNIRSI+?

Thermal Master ships an update every 3 weeks, and FNIRSI+ monthly. Most recently, Thermal Master was updated on October 25, 2026 and FNIRSI+ on October 25, 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.*