Psychrometrics vs Process Engineer Calc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Psychrometrics
This app provides tools for analyzing and quantifying air and moisture properties. It offers a comprehensive calculator, interactive chart, and project management features for HVAC engineers, meteorologists, and industrial professionals. Supports both SI and IP units for versatile use.
- Comprehensive psychrometric calculator
- Dual units support (SI/IP)
- Psychrometric process simulation
- Interactive psychrometric chart
- HVAC project management
- Printable project reports
- User-friendly interface
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Psychrometric calculations and interactive Charts. Calculate air properties, plot points and processes on the psychrometric chart, build complete systems, and export project reports to PDF. Whether you're analyzing a single air state or organizing a full HVAC workflow, Psychrometrics gives you the tools to work faster and more clearly on iPhone, iPad and macOS. Key Features Psychrometric Calculator Calculate dry-bulb temperature, wet-bulb temperature, relative humidity, humidity ratio, dew point, enthalpy, and other key air properties. Interactive Psychrometric Chart View psychrometric points and processes directly on the chart. Tap anywhere to instantly read the air properties at that point. Psychrometric Processes Model common HVAC processes including Cooling Coil, Adiabatic Mixing, Sensible Heating, Heating & Humidification, and Evaporative Cooling. Psychrometric Systems Create points, connect processes, and organize complete psychrometric systems for your projects. SI and IP Units Switch between metric and imperial units to match your workflow and project requirements. Project Saving and Management Save, load, and manage multiple psychrometric systems whenever needed. PDF Export and File Sharing Export project tables and charts to PDF, and share project files across iPhone and iPad. Built for iPhone, iPad, and macOS A clean interface designed for fast, practical psychrometric work. Light and Dark Mode Choose between light and dark appearance to match your preferences. Feedback is always welcome and helps shape future updates.
Process Engineer Calc
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ProcessCalc is an ad-free, offline-ready utility app designed specifically for chemical engineers, extraction technicians, and laboratory researchers. Whether you are scaling up a synthesis from bench to pilot scale, optimizing solvent recovery, or sizing a chiller for your jacketed reactor, this app provides 10 specialized engineering calculators to streamline your daily workflow. Key Calculators Included: • Solvent Recovery: Estimate evaporation rates and recovery times. • Chiller Sizing: Calculate required cooling capacity (kW) and tonnage. • Biomass Capacity & Yield: Optimize loading and predict expected yields. • Scale-up Predictor: Lab to production volume and flow rate scaling. • Condenser Area: Determine required heat transfer area. • Vapor Velocity: Avoid flooding in vacuum systems with min-ID calculations. • Pump Flow Rate: Quick displacement to LPM/LPH conversions. • Scaling Risk Predictor: Assess system scaling and maintenance needs. • Vacuum Diagnostic: Calculate rate-of-rise and system leak rates. • Compliance Map: Quick reference for global hemp/CBD regulations. App Features: Zero Ads: No pop-ups, no tracking, no subscriptions. Offline First: Works instantly in the lab or extraction facility where internet might be spotty. Favorites: Star your most-used tools for one-tap access. Practical: Built around real-world formulas used in extraction and chemical processing facilities. Designed by engineers, for engineers.
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Verdict
The clearest difference is price: Process Engineer Calc at Free against Psychrometrics's $3.99. Process Engineer Calc also leads on update cadence (every 10 days vs every 3 months). Psychrometrics's advantage is chart position (#178 vs unranked). On ads, in-app purchases, device support and iOS requirement 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
Process Engineer Calc is free to download; Psychrometrics costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Psychrometrics ships an update every 3 months, Process Engineer Calc every 10 days. The most recent releases landed on September 9, 2026 and September 12, 2026 respectively.
| Parameter | Psychrometrics | Process Engineer Calc |
|---|---|---|
| Price | $3.99 | Free — better |
| Rating | 4.2 (12 ratings) — better | — |
| Positive reviews | 20.0% of reviews | — |
| Number of ratings | 12 — better | — |
| Update frequency | Every 3 months | Every 10 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Best chart rank | #178 — better | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 18.6 | 17.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Wassim Murr | 冯泰 蔡 |
In-app purchases
Psychrometrics
No in-app purchases
Process Engineer Calc
No in-app purchases
Questions
Is Psychrometrics free?
Is Process Engineer Calc free?
Do Psychrometrics or Process Engineer Calc have ads?
Which is updated more often, Psychrometrics or Process Engineer Calc?
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