Comparison

Steam vs Unit Converter ++

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Steam

This app calculates thermodynamic and transport properties of water and steam under various conditions. It offers two industry-standard formulations and allows for unit customization and saving of calculations.

Highlights
  • Thermodynamic property calculations
  • Transport property calculations
  • Supports IF97 and IFC-67 formulations
  • Unit conversion (imperial/metric)
  • Save and compare calculations
  • Input range validation
Features
Read full description

Now with industrial and scientific steam tables! Fast, accurate, and comprehensive. Steam calculates the thermodynamic and transport properties of water and steam for subcooled, saturated, two-phase, superheated, and supercritical conditions. Steam is the tool you need if you're an engineer working with modern or legacy heat balances, or engineering students in thermodynamics, heat transfer, power cycles, and fluids classes. Three formulations are included for property calculations: - IAPWS Industrial Formulation 1997 for the Thermodynamic Properties of Water and Steam (IF97) - IAPWS Formulation 1995 for the Thermodynamic Properties of Ordinary Water Substance for General and Scientific Use (SF95) - 1967 IFC-Formulation for Industrial Use (IFC-67) Switch instantly between imperial (psia, F, Btu/lbm, etc.) or metric (kPa, C, kJ/kg, etc.) engineering units. Customize those sets of units for your needs. With just one tap, convert calculated outputs from one set of units to the other. A third set of units can be defined, and a units conversion calculator is also provided. Save calculations to review later or to compare differences between the formulations. On the settings tab, change the number of significant digits in the output, customize the engineering units, modify the font size, and select the theme for the app. Select one of the functions with these inputs: p,t - pressure and temperature p,h - pressure and specific enthalpy p,s - pressure and specific entropy h,s - specific enthalpy and specific entropy p,x - pressure and steam quality (vapor fraction) t,x - temperature and steam quality (vapor fraction) to calculate: - Specific enthalpy - Specific entropy - Specific internal energy - Specific volume - Density - Specific isobaric heat capacity - Specific isochoric heat capacity - Isentropic exponent - Speed of sound - Thermal conductivity - Dynamic viscosity - Kinetic viscosity - Prandtl number - Surface tension For saturated and two-phase (wet steam) conditions: - Saturation temperature - Saturation pressure - Saturated liquid, saturated vapor, and two-phase properties - Specific enthalpy - Specific enthalpy heat of vaporization - Specific entropy - Specific entropy of vaporization - Specific internal energy - Specific volume - Density For saturated liquid and saturated vapor conditions: - Specific isobaric heat capacity - Specific isochoric heat capacity - Isentropic exponent - Speed of sound - Thermal conductivity - Dynamic viscosity - Kinetic viscosity - Prandtl number Standards implemented in Steam: For the IAPWS-IF97 and IAPWS-95 calculations: - Revised Release on the IAPWS Industrial Formulation 1997 for the Thermodynamic Properties of Water and Steam, August 2007. - Revised Release on the IAPWS Formulation 1995 for the Thermodynamic Properties of Ordinary Water Substance for General and Scientific Use, September 2018 - Release on the IAPWS Formulation 2011 for the Thermal Conductivity of Ordinary Water Substance, September 2011 - Release on the IAPWS Formulation 2008 for the Viscosity of Ordinary Water Substance, September 2008 - Revised Release on the Surface Tension of Ordinary Water Substance, June 2014. - Revised Release on the Pressure along the Melting and Sublimination Curves of Ordinary Water Substance, September 2011 For the IFC-67 calculations: - A Formulation for the Thermodynamic Properties of Ordinary Water Substance, International Formulation Committee, February 1967. - Release on The IAPS Formulation 1985 for the Thermal Conductivity of Ordinary Water Substance, International Association for the Properties of Steam, September 1984. - Release on The IAPS Formulation 1985 for the Viscosity of Ordinary Water Substance, International Association for the Properties of Steam, September 1984. - Release on The Surface Tension of Water Substance, International Association for the Propererties of Steam, September 1975.

About

Unit Converter ++

Easily convert between various units of measurement for length, weight, temperature, volume, and more. This offline tool is designed for travelers, students, and professionals needing quick conversions.

Highlights
  • Converts length, weight, temperature, volume, and more
  • Supports numerous units of measurement
  • Works offline
  • Useful for travelers, students, and professionals
  • Covers speed, area, pressure, power, and energy units
Features
Read full description

Unit Converter ++ is an easy-to-use to converter length, weight, temperature, volume and multiple other units of measurement. Unit Converter ++ is useful for international travelers, students, cooks, engineers and anyone else who needs to convert between units. Units (abstract) Length: Mile, Yard, Foot, Inch, Kilometer, Meter, Centimeter... Temperature: Celsius, Fahrenheit... Volume: Gallon, Quart, Pint, Cup, Tablespoon, Teaspoon, Liter... Speed: Knots, Miles per Hour, Kilometers per Hour... Area: Square Mile, Square Foot, Acre... Weight: Ton, Pound, Ounce, Kilogram... Pressure: Pounds/Square Foot (psi), Bars, Inches of Mercury... Power: Horsepower, Kilowatts... Time: Years, Weeks, Days, Hours, Minutes... Energy: Calories, Ergs, Joules, Watt-Hours.. Fuel Consumption: Mile/Gallon (mpg), Liter/100 Kilometer.. Torque: Newton Meter, Pound-Force Foot... Force: Pound-Force, Dyne, Poundal... Unit Converter ++ works offline. Conversions are provided for informational purposes only, with no guarantee of accuracy or validity.

Screenshots

Steam4 screens
Unit Converter ++4 screens

Verdict

The call

The clearest difference is review sentiment: Steam at 89% against Unit Converter ++'s 20%. Steam also leads on rating (4.2 vs 1.6) and ads (none vs shown). Unit Converter ++'s advantage is price (Free vs $4.99) and iOS requirement (11.0 vs 26.0). On ratings volume, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Unit Converter ++ is free to download; Steam costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Steam holds the better App Store score, 4.2 against 1.6. Both are backed by a comparable volume of ratings — 14 and 10 respectively. Written reviews point the same way: 89% of Steam's written reviews are positive against 20% of Unit Converter ++'s.

UpkeepUpdate frequency

Steam ships an update every 6 weeks, Unit Converter ++ every 9 months. The most recent releases landed on October 31, 2026 and November 1, 2026 respectively.

Scorecard7 real differences · 3 level
Steam versus Unit Converter ++: the parameters behind the verdict, then further details
ParameterSteamUnit Converter ++
Price$4.99Free — better
Rating4.2 (14 ratings) — better1.6 (10 ratings)
Positive reviews88.9% of reviews — better20.0% of reviews
Number of ratings14 — better10
Update frequencyEvery 6 weeks — betterEvery 9 months
AdsNo — betterYes
In-app purchasesNoNo
MonetizationPaidAd-supported — better
DevicesiPhone, iPadiPhone, iPod
Requires iOS26.011.0 — better
Further details — not scored
Size11 MB6 MB
Age rating4+4+
DeveloperViewpoint PhotographyNirav Patel

Customer experience

Steam

All ratings14 ratings
Positive78.6%
Neutral14.3%
Negative7.1%
Written reviews9 reviews
Positive88.9%
Neutral0.0%
Negative11.1%

Unit Converter ++

All ratings10 ratings
Positive10.0%
Neutral0.0%
Negative90.0%
Written reviews10 reviews
Positive20.0%
Neutral0.0%
Negative80.0%

In-app purchases

None

Steam

No in-app purchases

None

Unit Converter ++

No in-app purchases

Questions

Is Steam free?
Steam costs $4.99, with no in-app purchases.
Is Unit Converter ++ free?
Unit Converter ++ is free to download, with no in-app purchases.
Which has better reviews, Steam or Unit Converter ++?
Steam is rated higher. Steam averages 4.2 out of 5 from 14 ratings, while Unit Converter ++ averages 1.6 from 10 ratings.
Do Steam or Unit Converter ++ have ads?
Unit Converter ++ shows ads; Steam does not.
Which is updated more often, Steam or Unit Converter ++?
Steam ships an update every 6 weeks, and Unit Converter ++ every 9 months. Most recently, Steam was updated on October 31, 2026 and Unit Converter ++ on November 1, 2026.

Other comparisons