Mec Eng Tools vs Vapour Pressures
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Mec Eng Tools
This utility app calculates thermodynamic properties using IAPWS-97 equations. It allows users to determine various properties like pressure, temperature, enthalpy, and specific volume based on different input parameters. The app supports multiple units for calculations.
- IAPWS-97 equation calculations
- Calculate properties from pressure and temperature
- Calculate properties from pressure and enthalpy
- Calculate properties from pressure and entropy
- Calculate properties from pressure and quality
- Support for multiple units
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Steam Tables Lite has evolved into Mec Eng Tools. Your water and steam tools are now part of a mechanical engineering calculation workspace. Explore eight modules organized by discipline: • Steam Tables: water and steam properties, thermodynamic states, records and diagrams. • Heat & Mass Transfer: conduction, convection, radiation, phase change, heat exchangers and mass transfer. • Steam Turbines: performance, extractions, energy balances and expansion diagrams. • Fluid Mechanics: properties, flows, pressure losses and hydraulic machinery. • Pipe Tools: dimensions, schedules and piping calculations. • Machine Design: tools for analyzing mechanical components. • Stress & Strain: models for exploring structural element behavior. • Pressure Vessels: shell and head calculations and checks available in the module. CALCULATE AND UNDERSTAND Choose a model, enter your data and review results with their units. Where applicable, select data from integrated catalogs and tables. Learn through theory, illustrations and worked examples. Save calculations and export reports in tools that support these features. YOUR STEAM TABLES IS STILL HERE The Steam Tables module retains its tools and the option to restore previous purchases. English, Portuguese and Spanish. Light and dark interfaces for iPhone and iPad. Some features require an in-app purchase. Review the included items on the purchase screen before confirming.
Vapour Pressures
Calculate vapor pressures and boiling points quickly and accurately with this tool. It features two extensive databases and supports various units, making it ideal for engineers, scientists, and students working with phase-change phenomena.
- Vapor pressure calculation
- Boiling point calculation
- Extensive substance databases
- Support for multiple units
- Multi-language support
- No data collection
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Vapour Pressures is a powerful, easy-to-use tool designed for engineers, scientists, students, and anyone working with phase-change phenomena who need to calculate vapor pressures and boiling points quickly and accurately. With two extensive built-in databases covering a wide range of substances, and full support for numerous pressure and temperature units, Vapour Pressures adapts to your workflow whether you’re in the lab, classroom or field. Enter the known variables and instantly obtain the corresponding vapor pressure or boiling point in your preferred units. The app supports multiple languages and requires no data collection — making it ideal for both personal and professional use. Make your gas-liquid equilibrium calculations streamlined, reliable and accessible with Vapour Pressures.
Screenshots
Verdict
The clearest difference is price: Mec Eng Tools at Free against Vapour Pressures's $3.99. Mec Eng Tools also leads on review sentiment (21% vs 0%) and update cadence (every 2 months vs every 6 months). Vapour Pressures's advantage is in-app purchases (none vs 10). On ads 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
Mec Eng Tools is free to download; Vapour Pressures costs $3.99 up front. Mec Eng Tools sells 10 one-off in-app purchases. Vapour Pressures asks for nothing beyond the download.
Mec Eng Tools ships an update every 2 months, Vapour Pressures every 6 months. The most recent releases landed on November 6, 2026 and November 11, 2026 respectively.
| Parameter | Mec Eng Tools | Vapour Pressures |
|---|---|---|
| Price | Free — better | $3.99 |
| Rating | — | 2.0 (1 ratings) — better |
| Positive reviews | 21.1% of reviews — better | 0.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 2 months — better | Every 6 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 41 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Eduardo Almeida | Irving Josue Cortes Iturriaga |
Customer experience
Mec Eng Tools
Vapour Pressures
In-app purchases
Mec Eng Tools
- Upgrade Steam Tables$3.99
- Stress & Strain$4.99
- Machine Design$4.99
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- Pressure Vessels$4.99
- Fluids & Piping Pack$6.99
- Thermal Pack: Steam Complement$6.99
- Thermal Sciences Pack$10.49
- Solids & Design Pack$10.49
- Collection: Steam Complement$24.49
- Complete Engineering Collection$27.99
Vapour Pressures
No in-app purchases
Questions
Is Mec Eng Tools free?
Is Vapour Pressures free?
Do Mec Eng Tools or Vapour Pressures have ads?
Which is updated more often, Mec Eng Tools or Vapour Pressures?
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