Comparison

Mec Eng Tools vs Vapour Pressures

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

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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.

About

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.

Highlights
  • Vapor pressure calculation
  • Boiling point calculation
  • Extensive substance databases
  • Support for multiple units
  • Multi-language support
  • No data collection
Features
Read full description

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

Mec Eng Tools4 screens
Vapour Pressures4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard6 real differences · 4 level
Mec Eng Tools versus Vapour Pressures: the parameters behind the verdict, then further details
ParameterMec Eng ToolsVapour Pressures
PriceFree — better$3.99
Rating—2.0 (1 ratings) — better
Positive reviews21.1% of reviews — better0.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 2 months — betterEvery 6 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.1 — better17.0
Further details — not scored
Size41 MB14 MB
Age rating4+4+
DeveloperEduardo AlmeidaIrving Josue Cortes Iturriaga

Customer experience

Mec Eng Tools

Written reviews19 reviews
Positive21.1%
Neutral15.8%
Negative63.2%

Vapour Pressures

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

10 purchases

Mec Eng Tools

One-time10
  • Upgrade Steam Tables$3.99
  • Stress & Strain$4.99
  • Machine Design$4.99
Show 7 more
  • 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
None

Vapour Pressures

No in-app purchases

Questions

Is Mec Eng Tools free?
Mec Eng Tools is free to download, with in-app purchases available.
Is Vapour Pressures free?
Vapour Pressures costs $3.99, with no in-app purchases.
Do Mec Eng Tools or Vapour Pressures have ads?
Neither Mec Eng Tools nor Vapour Pressures shows ads.
Which is updated more often, Mec Eng Tools or Vapour Pressures?
Mec Eng Tools ships an update every 2 months, and Vapour Pressures every 6 months. Most recently, Mec Eng Tools was updated on November 6, 2026 and Vapour Pressures on November 11, 2026.

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