# Temp Master vs FNIRSI+

The clearest difference is iOS requirement: Temp Master at 11.0 against FNIRSI+'s 13.0. 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.

Temp Master ships an update every 5 weeks, FNIRSI+ every 4 weeks. The most recent releases landed on August 9, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Temp Master | FNIRSI+ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.2 (12 ratings)](https://appshunter.io/ios/app/temp-master/id6737321665/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 40.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 4 weeks** |
| Monetization | Free | — |
| Size | 43 MB | 29 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 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

### Temp Master

[App page](https://appshunter.io/ios/app/temp-master/id6737321665)

This utility app enhances thermal imaging capabilities for compatible Thermal Master devices, offering precise temperature detection and advanced image analysis. It allows users to view, save, and export thermal data offline, with features like digital zoom and improved resolution for various inspection tasks.

**Highlights:** High-accuracy temperature detection, Enhanced infrared resolution, Offline data viewing and export, Up to 15x digital zoom, Reduced background noise, Long battery life optimization

**Features:** macOS Compatibility

**In-app purchases:** none


### FNIRSI+

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

**In-app purchases:** none


## Frequently asked questions

### Is Temp Master free?

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

### Is FNIRSI+ free?

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

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

Neither Temp Master nor FNIRSI+ shows ads.

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

Temp Master ships an update every 5 weeks, and FNIRSI+ every 4 weeks. Most recently, Temp Master was updated on August 9, 2026 and FNIRSI+ on September 14, 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.*