# TAS Viewer vs IR master

The clearest difference is review sentiment: TAS Viewer at 100% against IR master's 27%. 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.

TAS Viewer ships an update every 2 months, IR master every 3 months. The most recent releases landed on September 15, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | TAS Viewer | IR master |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.7 (3 ratings)](https://appshunter.io/ios/app/ir-master/id1614218116/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | **100.0% of reviews** | 26.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Free | Free |
| Size | 32 MB | 77 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [红杰 李](https://appshunter.io/developer/1602186097) | [InfiRay Technologies Co.,Ltd.](https://appshunter.io/developer/1516230719) |

## What reviewers say

### TAS Viewer

[App page](https://appshunter.io/ios/app/tas-viewer/id1605567151)

This application provides tools for the secondary analysis of infrared imaging data. It allows users to examine and interpret thermal images for various purposes.

**Highlights:** Infrared imaging secondary analysis, Thermal image interpretation, Data examination tools

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is TAS Viewer free?

TAS Viewer is free to download, with no in-app purchases.

### Is IR master free?

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

### Do TAS Viewer or IR master have ads?

Neither TAS Viewer nor IR master shows ads.

### Which is updated more often, TAS Viewer or IR master?

TAS Viewer ships an update every 2 months, and IR master every 3 months. Most recently, TAS Viewer was updated on September 15, 2026 and IR master on October 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.*