# Wattson vs Thermal Viewer

The clearest difference is device support: Thermal Viewer at 4 against Wattson's 1. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Wattson sells 1 one-off in-app purchase and Thermal Viewer sells 3 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 5 days. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Wattson | Thermal Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/thermal-viewer-ir-analyzer/id6779991634/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 days | Every 5 days |
| Monetization | — | Freemium |
| Size | 44 MB | 35 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod, Mac** |
| Age rating | 17+ | 4+ |
| Developer | [Marin Martinovic](https://appshunter.io/developer/1871459610) | [Rush Tools LLC](https://appshunter.io/developer/1896773547) |

## What reviewers say

### Wattson

[App page](https://appshunter.io/ios/app/wattson-electrical-calculator/id6760766587)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Wattson Pro | $5.99 | one-time |


### Thermal Viewer

[App page](https://appshunter.io/ios/app/thermal-viewer-ir-analyzer/id6779991634)

Analyze radiometric thermal images directly on your iPhone, iPad, or Mac. This app supports various thermal file formats and offers advanced analysis tools like temperature readings, measurement tools, and color palettes. Export data and images for further review, all while keeping your images private and offline.

**Highlights:** Radiometric thermal image analysis, Temperature measurement (spot, box, ellipse, line), Multiple color palettes, Live re-analysis with adjustable parameters, Visible-light blend and MSX-style overlay, Export temperature matrix to CSV, Batch export of images and settings

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Weekly | $4.99 | per 7 days |
| Pro Yearly | $29.99 | per year |
| Lifetime Access | $49.99 | one-time |


## Frequently asked questions

### Is Wattson free?

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

### Is Thermal Viewer free?

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

### Do Wattson or Thermal Viewer have ads?

Neither Wattson nor Thermal Viewer shows ads.

### Which is updated more often, Wattson or Thermal Viewer?

Wattson ships an update every 5 days, and Thermal Viewer every 5 days. Most recently, Wattson was updated on October 31, 2026 and Thermal Viewer on November 5, 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.*