# nH2O

> Steam and water thermodynamic property calculator for engineering and simulation. (iPhone/iPad app by nHance Technologies, Inc..)

- Source: https://appshunter.io/ios/app/nh2o/id419432621 (this page in markdown: same URL + `.md`)
- Developer: [nHance Technologies, Inc.](https://appshunter.io/developer/419432624)
- Category: Reference, Education
- Price: Free
- Rating: 4.00/5 from 3 App Store ratings · 8 written reviews indexed
- Age rating: 4+
- Requires: iOS 9.3 · 5 MB
- Languages: American English
- Released: 2011-02-16
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/nh2o/id419432621/reviews.md

## What is nH2O?

nH2O is a “water property” calculator that calculates various thermodynamic properties of steam and water.  nH2O is based upon the Modular Modeling System (MMS) steam property library which is composed of a set of routines, some polynomials and some table interpolations of the thermodynamic properties of steam and water.  In general, all subcooled liquid and superheated vapor of steam properties are accurate to +/- 0.24% within a pressure range of 0.01 to 6,000 psia and enthalpy ranges from 100 btu/lbm to 1600 btu/lbm outside the saturation region.  Saturated properties are accurate to within +/- 0.24% from 0.1 psia to 3,200 psia within the saturated region.

The Calculator calculates:

Saturation Properties as a function of Pressure (P)
Saturation Properties as a function of Temperature (T)
Subcooled, Saturation, Superheated properties as a function of Pressure & Enthalpy (PH)
Subcooled, Saturation, Superheated properties as a function of Pressure & Temperature (PT)

Calculated properties include Pressure (P), Temperature (T), Enthalpy (h), Entropy (s), Specific Volume (v), Density (ρ), and Quality (x).

Support is provided for both US Conventional units, and Conventional SI units.

** NOTE: The functions used in the nH2O calculator are designed for dynamic thermodynamic simulation. They are generally accurate to within 1% of conventional routines, but are NOT identical to ASME, IAPWS, or IFC formulations. **

## Key features

- Calculates steam and water thermodynamic properties
- Supports saturation properties by pressure and temperature
- Calculates subcooled, saturation, and superheated properties
- Provides pressure, temperature, enthalpy, entropy, specific volume, density, and quality
- Supports US Conventional and SI units

## Recent user reviews (8 of 8)

All indexed reviews: https://appshunter.io/ios/app/nh2o/id419432621/reviews.md

### 5/5 — Cool App

*2016-02-25, version 2.0.2*

Verified the results and they are correct. Awesome free app 👍👍👍

### 1/5 — Just wrong

*2013-06-19, version 1.4.1*

I've compared the results with other tables and they are wrong. Wrong enough to not use it for engineering

### 3/5 — Inaccurate

*2012-03-09, version 1.4.1*

The saturation temperatures do not match up with the saturation pressures correctly. A good example is at 27 C. The enthalpy should be ~113 but it is ~123. The app is good for rough calculations. If they fixed the saturation temperatures and pressures then it would be 5 stars.

### 5/5 — Great App!!!

*2012-02-07, version 1.4.1*

As a mechanical engineer, this app really helps and saves me a lot of time.

### 5/5 — Useful for the price

*2012-01-11, version 1.4.1*

Very reliable free app for steam tables

### 5/5 — Great for power plant operators!

*2011-08-01, version 1.4.0*

I use it for telling me what my super heat is at while starting up a power plant. It would be nice if it just told me how much super heat I have. Instead of going off of the heat above saturation temp but it works. Thank you for making the app!!!

### 5/5 — A must for the sociable geek

*2011-03-16, version 1.4.0*

I'm in a bar right now and downloaded this app to calculate the amount of heat removed per gallon of water charged to a Japanese nuke plant.  Nothing impresses the ladies more, btw.  With the help of this fine free app I was able to showcase my engineering prowess and walk away with a girl's number.

### 5/5 — Great app for the price

*2011-02-19, version 1.4.0*

Nice simple app for quick calculations. I wish it had a way to export or email results but other than that, this is fine!

## Frequently asked questions about nH2O

### What are the accuracy limitations of nH2O?

nH2O's functions are generally accurate to within 1% of conventional routines. They are designed for dynamic thermodynamic simulation and are not identical to ASME, IAPWS, or IFC formulations. Specific accuracy ranges are provided for subcooled liquid and superheated vapor properties.

### What specific properties can nH2O calculate?

nH2O can calculate Pressure (P), Temperature (T), Enthalpy (h), Entropy (s), Specific Volume (v), Density (ρ), and Quality (x) for steam and water.

### Does nH2O support different unit systems?

Yes, nH2O supports both US Conventional units and Conventional SI units, making it versatile for users worldwide.

### What calculation methods does nH2O offer?

nH2O calculates saturation properties as a function of Pressure (P) and Temperature (T). It also calculates subcooled, saturation, and superheated properties as a function of Pressure & Enthalpy (PH) or Pressure & Temperature (PT).

### What is the age rating for nH2O?

nH2O has an age rating of 4+, making it suitable for a wide range of users.

### On which devices can I use nH2O?

nH2O is available for iPhone, iPad, and iPod devices.

### How often is nH2O updated?

The latest version of nH2O is 2.1.0, which was last updated on June 26, 2020. Future updates may be released by the developer.

### What is the developer of nH2O?

nH2O is developed by nHance Technologies, Inc.

## Version history (last 5 releases)

### 2.1.0 — 2020-06-26

iOS 13 support

### 2.0.5 — 2018-11-08

Updates for iPhone X and updated information page.

### 2.0.4 — 2018-03-08

Bug fix for iPhone X display.

### 2.0.3 — 2018-03-07

Update for latest iOS

### 2.0.2 — 2014-08-01

Bug fix for iOS 6 where the app would not load.

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## More apps by nHance Technologies, Inc.

- [SyncGen](https://appshunter.io/ios/app/syncgen/id657913851)

All apps by nHance Technologies, Inc.: https://appshunter.io/developer/419432624

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*