# Temp Master vs TechRef

The clearest difference is in-app purchases: Temp Master at none against TechRef's 1. Temp Master also leads on iOS requirement (11.0 vs 17.6). TechRef's advantage is update cadence (every 4 days vs every 5 weeks). On price, ads and device support there is nothing between them.

Both are free to download. TechRef sells 1 one-off in-app purchase. Temp Master asks for nothing beyond the download.

Temp Master ships an update every 5 weeks, TechRef every 4 days. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Temp Master | TechRef |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.1 (14 ratings)](https://appshunter.io/ios/app/temp-master/id6737321665/reviews)** | — |
| Number of ratings | **14** | — |
| Positive reviews | 40.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 4 days** |
| Monetization | Free | — |
| Size | 43 MB | 6 MB |
| Requires iOS | **11.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Thermal Master Technology Co.,Ltd.](https://appshunter.io/developer/1770222118) | [MASARU KATO](https://appshunter.io/developer/1883480774) |

## 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


### TechRef

[App page](https://appshunter.io/ios/app/techref/id6775818457)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TechRef Pro | $6.99 | one-time |


## Frequently asked questions

### Is Temp Master free?

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

### Is TechRef free?

TechRef is free to download, with in-app purchases available.

### Do Temp Master or TechRef have ads?

Neither Temp Master nor TechRef shows ads.

### Which is updated more often, Temp Master or TechRef?

Temp Master ships an update every 5 weeks, and TechRef every 4 days. Most recently, Temp Master was updated on November 4, 2026 and TechRef on October 31, 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.*