# Thermo Physical Prop vs XSpecApp

The clearest difference is price: XSpecApp at Free against Thermo Physical Prop's $4.99. XSpecApp also leads on rating (3.5 vs 1.0) and update cadence (every 2 days vs every 8 months). Thermo Physical Prop's advantage is in-app purchases (none vs 1). On ratings volume, ads and device support there is nothing between them.

XSpecApp is free to download; Thermo Physical Prop costs $4.99 up front. XSpecApp sells 1 one-off in-app purchase. Thermo Physical Prop asks for nothing beyond the download.

XSpecApp holds the better App Store score, 3.5 against 1.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

Thermo Physical Prop ships an update every 8 months, XSpecApp every 2 days. The most recent releases landed on September 12, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Thermo Physical Prop | XSpecApp |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/thermo-physical-prop/id460148819/reviews) | **[3.5 (2 ratings)](https://appshunter.io/ios/app/xspecapp/id1666746288/reviews)** |
| Number of ratings | 1 | **2** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 2 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 1 MB | 48 MB |
| Requires iOS | 14.3 | **8.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kaup Shenoy Associates](https://appshunter.io/developer/460148822) | [Brian Cross, XRF Consulting, LLC](https://appshunter.io/developer/1666746290) |

## What reviewers say

### Thermo Physical Prop

[App page](https://appshunter.io/ios/app/thermo-physical-prop/id460148819)

Access essential thermo-physical property data for seventeen common industrial fluids. This app provides quick reference for engineers and students in thermodynamics, fluid mechanics, and heat transfer, aiding in flow system design computations.

**Highlights:** Data for 17 common industrial fluids, SI and USCS unit options, Transport properties (density, viscosity, etc.), Gas properties (molecular weight, specific heat ratio, etc.), Steam table with saturated and superheat conditions, Humid air properties (humidity ratio, dew point, etc.)

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

**In-app purchases:** none


### XSpecApp

[App page](https://appshunter.io/ios/app/xspecapp/id1666746288)

This application displays EDXRF spectra, allowing users to manually identify elements, calculate ROIs, and add annotations. It supports saving, loading, and printing spectra with detailed information. The app can also acquire spectra using a digital pulse processor via USB, Serial, or wireless connections.

**Highlights:** Manual element identification, ROI calculation for peaks, Spectrum annotations, Spectrum printing with ROIs, Save and load spectra, Acquire spectra via digital pulse processor

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| XSpecApp | $24.99 | one-time |


## Frequently asked questions

### Is Thermo Physical Prop free?

Thermo Physical Prop costs $4.99, with no in-app purchases.

### Is XSpecApp free?

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

### Which has better reviews, Thermo Physical Prop or XSpecApp?

XSpecApp is rated higher. Thermo Physical Prop averages 1.0 out of 5 from 1 ratings, while XSpecApp averages 3.5 from 2 ratings.

### Do Thermo Physical Prop or XSpecApp have ads?

Neither Thermo Physical Prop nor XSpecApp shows ads.

### Which is updated more often, Thermo Physical Prop or XSpecApp?

Thermo Physical Prop ships an update every 8 months, and XSpecApp every 2 days. Most recently, Thermo Physical Prop was updated on September 12, 2026 and XSpecApp on September 9, 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.*