# Steam Tables Pro vs RMI Apps

The clearest difference is price: RMI Apps at Free against Steam Tables Pro's $4.99. RMI Apps also leads on iOS requirement (13.0 vs 15.1). On update cadence, ads, in-app purchases and device support there is nothing between them.

RMI Apps is free to download; Steam Tables Pro costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 16, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Steam Tables Pro | RMI Apps |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Positive reviews | 26.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Paid | — |
| Size | 30 MB | 54 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Eduardo Almeida](https://appshunter.io/developer/906209752) | [Mumuh Kustino](https://appshunter.io/developer/1639847836) |

## What reviewers say

### Steam Tables Pro

[App page](https://appshunter.io/ios/app/steam-tables-pro/id906209749)

This app calculates a comprehensive range of thermodynamic properties for steam using the IAPWS-97 equations. It allows calculations based on various input parameters like pressure, temperature, enthalpy, entropy, and quality, and displays results in charts.

**Highlights:** Calculates properties from pressure and temperature, Calculates properties from pressure and enthalpy, Calculates properties from pressure and entropy, Calculates properties from pressure and quality, Calculates properties from saturated temperature and quality, Calculates properties from enthalpy and entropy, Displays results in T-s, P-h, and H-s charts, Supports multiple units

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

**In-app purchases:** none


### RMI Apps

[App page](https://appshunter.io/ios/app/rmi-apps/id6448507792)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Steam Tables Pro free?

Steam Tables Pro costs $4.99, with no in-app purchases.

### Is RMI Apps free?

RMI Apps is free to download, with no in-app purchases.

### Do Steam Tables Pro or RMI Apps have ads?

Neither Steam Tables Pro nor RMI Apps shows ads.

### Which is updated more often, Steam Tables Pro or RMI Apps?

Steam Tables Pro ships an update every 2 months, and RMI Apps every 2 months. Most recently, Steam Tables Pro was updated on September 16, 2026 and RMI Apps on September 13, 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.*