# Thermal Light vs TAS Viewer

The clearest difference is review sentiment: TAS Viewer at 100% against Thermal Light's 50%. TAS Viewer also leads on price (Free vs $1.99) and iOS requirement (14.0 vs 16.6). Thermal Light's advantage is update cadence (weekly vs every 2 months). On ads, in-app purchases and device support there is nothing between them.

TAS Viewer is free to download; Thermal Light costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Thermal Light ships an update weekly, TAS Viewer every 2 months. The most recent releases landed on October 2, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Thermal Light | TAS Viewer |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[2.3 (6 ratings)](https://appshunter.io/ios/app/thermal-light/id476998738/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 months |
| Monetization | Paid | **Free** |
| Size | 2 MB | 32 MB |
| Requires iOS | 16.6 | **14.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Crystal Clear Solutions](https://appshunter.io/developer/444062170) | [红杰 李](https://appshunter.io/developer/1602186097) |

## What reviewers say

### Thermal Light

[App page](https://appshunter.io/ios/app/thermal-light/id476998738)

This app measures the temperature of extremely hot objects by analyzing the light they emit. It's designed for users working with materials like iron, steel, and copper, offering a cost-effective alternative to specialized thermometers.

**Highlights:** Measures temperatures from 1000F to 2700F, Uses black body radiation analysis, Calibrated against certified IR thermometer, Cost-effective alternative to IR thermometers, Supports iron, steel, and ceramics

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Thermal Light free?

Thermal Light costs $1.99, with no in-app purchases.

### Is TAS Viewer free?

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

### Do Thermal Light or TAS Viewer have ads?

Neither Thermal Light nor TAS Viewer shows ads.

### Which is updated more often, Thermal Light or TAS Viewer?

Thermal Light ships an update weekly, and TAS Viewer every 2 months. Most recently, Thermal Light was updated on October 2, 2026 and TAS Viewer on September 15, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*