# StateCalc > Thermodynamic properties calculator for 88 industrial materials using CoolProp database. (iPhone/iPad app by Babak Samareh.) - Source: https://appshunter.io/ios/app/statecalc/id891848148 (this page in markdown: same URL + `.md`) - Developer: [Babak Samareh](https://appshunter.io/developer/891848151) - Category: Education, Utilities - Price: $2.99 with in-app purchases - Rating: 2.17/5 from 6 App Store ratings · 2 written reviews indexed - Age rating: 4+ - Requires: iOS 10.0 · 19 MB - Languages: English - Released: 2014-07-13 - Data updated: 2026-06-10 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/statecalc/id891848148/reviews.md ## What is StateCalc? THERMODYNAMIC PROPERTIES CALCULATOR FOR 88 MATERIALS Calculate thermodynamic properties of different industrial important materials based on the CoolProp thermophysical properties database for pure and pseudo-pure fluids. 1 - Find all the thermodynamic properties for Steam, Ammonia, Propane, R-22, R-134a, Carbon Dioxide, Carbon Monoxide, Carbonyl Sulfide, Hydrogen Sulfide, Oxygen, and 78 other materials available for in-app purchase. 2 - See the location of the fixed state on T - s, T - v, and P - h diagrams. 3 - Available properties are temperature, pressure, specific volume, internal energy, enthalpy, entropy, quality, specific heat capacities, sound speed, thermal conductivity, and viscosity. 4 - Compressed liquid, saturated, and super-heated regions are automatically identified. 5 - Two sets of predefined unit systems (SI and British) plus custom units defined separately for each variable. 6 - Information sheet for each pure fluid indicating the chemical and skeletal formula, GHS hazard specification, critical and triple point information, CAS number, and molar mass. 7 - 4 reference states of default, IIR, ASHRAE, and NBP. 8 - Ability to email or text message the calculated properties. ## Key features - Thermodynamic property calculation - Support for 88 materials - State visualization on T-s, T-v, P-h diagrams - Identification of compressed liquid, saturated, and super-heated regions - Customizable unit systems - Fluid information sheets - Email/text calculated properties ## Pricing and in-app purchases Base price: $2.99. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Refrigerants | $1.99 | one-time | | Hydrocarbons | $1.99 | one-time | | Diatomic & Noble Gases | $0.99 | one-time | | Miscellaneous | $0.99 | one-time | ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/statecalc/id891848148/reviews.md ### 1/5 — Please update *2021-10-10, version 6.0* Great app with older os, currently crashes every instance with newest os ### 1/5 — App is unusable! *2020-11-22, version 6.0* This app had promise implementing the Coolprop thermo calc engine but the UI is totally nonfunctional on an uptodate ios. The UI stalls after each user interaction and renders the app unusable. Come on Apple you should be curating out this trash! ## Frequently asked questions about StateCalc ### What materials can StateCalc calculate properties for? StateCalc can calculate thermodynamic properties for 88 industrial materials, including Steam, Ammonia, Propane, R-22, R-134a, Carbon Dioxide, and many others. Additional materials are available for in-app purchase. ### What thermodynamic properties does StateCalc provide? StateCalc provides temperature, pressure, specific volume, internal energy, enthalpy, entropy, quality, specific heat capacities, sound speed, thermal conductivity, and viscosity for selected materials. ### Can I visualize the state of materials with StateCalc? Yes, StateCalc allows you to see the location of the fixed state on T-s, T-v, and P-h diagrams, aiding in the understanding of material behavior. ### Does StateCalc support different unit systems? StateCalc offers two sets of predefined unit systems (SI and British) and also allows for custom units to be defined separately for each variable, providing flexibility for users. ### What information is available in the fluid information sheets? For each pure fluid, StateCalc provides an information sheet detailing the chemical and skeletal formula, GHS hazard specification, critical and triple point information, CAS number, and molar mass. ### What is the price of StateCalc? StateCalc is a paid application priced at $2.99. This one-time purchase grants access to its core features. ### How often is StateCalc updated? The latest version of StateCalc is 6.0, which was last updated on October 26, 2016. Future updates may introduce new features or material support. ### What is the age rating for StateCalc? StateCalc has an age rating of 4+, making it suitable for a wide range of users including younger students and professionals. ## Version history (last 5 releases) ### 6.0 — 2016-10-26 This app has been updated by Apple to display the Apple Watch app icon. The biggest update since app release: 1 - New "statePicker" option: select state points on T-s, T-v, or P-h plots and retrieve data. 2 - New interface design. 3 - iOS 10 compatibility. 4 - New CoolProp engine 6.0.1 added. 5 - Major and minor bug fixes and stability improvements. ### 5.5 — 2016-09-08 - Stability improvements. - Minor bug fixes ### 5.2 — 2016-05-31 * Stability improvements * Minor bug fixes ### 5.1 — 2015-10-01 1 - iOS 9 compatible 2 - Latest CoolProp engine 5.1.1 3 - stability improvements ### 5.0 — 2015-06-23 1 - 4 different reference states of default, IIR, ASHRAE, and NBP are added. 2 - GHS hazard classes are added for all the materials. 3 - Updated CoolProp engine. 4 - Minor bug fix and stability improvements. ## Apps similar to StateCalc | App | Rating | Price | Category | | --- | --- | --- | --- | | [务实](https://appshunter.io/ios/app/id1474765920) | — | Free | Education | | [DoodleConnect](https://appshunter.io/ios/app/doodleconnect/id1176073180) | 4.7 (55) | Free | Education | | [Solar System Simulator](https://appshunter.io/ios/app/solar-system-simulator/id1190193240) | 2.0 (3) | Free | Education | | [Campus Labs® Event Check-in](https://appshunter.io/ios/app/campus-labs-event-check-in/id1221503400) | 4.8 (1,381) | Free | Education | | [FlightPlan!](https://appshunter.io/ios/app/flightplan/id1466581760) | 1.0 (4) | Free | Education | | [La_Rech__1](https://appshunter.io/ios/app/la-rech-1/id1475627680) | — | Free | Education | --- *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.*