Interpolator vs Mec Eng Tools
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Interpolator
Easily find values within tables using interpolation for two or three rows. This utility app simplifies calculations without needing a separate calculator, making it ideal for various table-based environments.
- Two-row interpolation
- Three-row interpolation
- Table value lookup
- No calculator needed
- Cargo surveyor tool
- General table use
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This is a small app which makes it very easy to look up values in tables (math etc) when you have to interpolate both in two and in three rows. No more need for a calculator to interpolate manually. This app was designed primarily for cargo surveyors working with tank calibration tables, but the app does have its application in any environment where tables are used. As of 13th January 2015, this app has become FREE until further notice.
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.
Screenshots
Verdict
The clearest difference is review sentiment: Interpolator at 67% against Mec Eng Tools's 21%. Interpolator also leads on in-app purchases (none vs 10) and iOS requirement (12.0 vs 15.1). On price, update cadence, 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
Both are free to download. Mec Eng Tools sells 10 one-off in-app purchases. Interpolator asks for nothing beyond the download.
Interpolator ships an update every 4 months, Mec Eng Tools every 2 months. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.
| Parameter | Interpolator | Mec Eng Tools |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (75 ratings) — better | — |
| Positive reviews | 66.7% of reviews — better | 21.1% of reviews |
| Number of ratings | 75 — better | — |
| Update frequency | Every 4 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 18 MB | 41 MB |
| Age rating | +4 | 4+ |
| Developer | ron mooring | Eduardo Almeida |
Customer experience
Interpolator
Mec Eng Tools
In-app purchases
Interpolator
No 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
Questions
Is Interpolator free?
Is Mec Eng Tools free?
Do Interpolator or Mec Eng Tools have ads?
Which is updated more often, Interpolator or Mec Eng Tools?
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