# Unit Converter vs Thermal Viewer

The clearest difference is review sentiment: Thermal Viewer at 50% against Unit Converter's 0%. Thermal Viewer also leads on rating (5.0 vs 1.0) and update cadence (every 6 days vs every 28 months). Unit Converter's advantage is in-app purchases (none vs 3) and iOS requirement (11.0 vs 15.0). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Thermal Viewer sells 3 in-app purchases, starting at $4.99 per 7 days. Unit Converter asks for nothing beyond the download.

Thermal Viewer holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews point the same way: 0% of Unit Converter's written reviews are positive against 50% of Thermal Viewer's.

Unit Converter ships an update every 28 months, Thermal Viewer every 6 days. The most recent releases landed on October 11, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Unit Converter | Thermal Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/unit-converter-utility-app/id1187153449/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/thermal-viewer-ir-analyzer/id6779991634/reviews)** |
| Number of ratings | 1 | **2** |
| Positive reviews | 0.0% of reviews | **50.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 28 months | **Every 6 days** |
| Monetization | **Free** | Freemium |
| Size | 30 MB | 35 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Dipen Patel](https://appshunter.io/developer/352249653) | [Rush Tools LLC](https://appshunter.io/developer/1896773547) |

## What reviewers say

### Unit Converter

[App page](https://appshunter.io/ios/app/unit-converter-utility-app/id1187153449)

Easily convert measurements between various units with a clean and intuitive interface. Supports over 20 categories including length, mass, temperature, and volume.

**Highlights:** Converts between units, Supports 20+ categories, Clean interface design, Intuitive navigation, Free to use

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 image formats and offers detailed temperature analysis, including spot, box, and ellipse measurements. It allows for live re-analysis and export of data and settings, all while keeping your images private and offline.

**Highlights:** Analyze radiometric thermal images, Supports multiple thermal file formats, Tap to read exact temperature, Add spot, box, ellipse, and line measurements, 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 Unit Converter free?

Unit Converter is free to download, with no in-app purchases.

### Is Thermal Viewer free?

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

### Which has better reviews, Unit Converter or Thermal Viewer?

Thermal Viewer is rated higher. Unit Converter averages 1.0 out of 5 from 1 ratings, while Thermal Viewer averages 5.0 from 2 ratings.

### Do Unit Converter or Thermal Viewer have ads?

Neither Unit Converter nor Thermal Viewer shows ads.

### Which is updated more often, Unit Converter or Thermal Viewer?

Unit Converter ships an update every 28 months, and Thermal Viewer every 6 days. Most recently, Unit Converter was updated on October 11, 2026 and Thermal Viewer on October 28, 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.*