219+ iOS apps curated and reviewed
Looking for free dhf calculator apps? 19 of our 219+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 2.5★ (25) | No | No | May 2026 |
| 2 |  | Free | 4.8★ (17K) | No | No | Jul 2026 |
| 3 |  | Free | 4.8★ (39K) | No | Yes | Jul 2026 |
| 4 |  | Free | 3.8★ (563) | Yes | No | Jul 2026 |
| 5 |  | Free | 4.2★ (816) | No | No | Jul 2026 |
| 6 |  | $9.99 | 4.9★ (5K) | No | No | Jul 2026 |
| 7 |  | Free | 4.8★ (4.5K) | Yes | No | Jul 2026 |
| 8 |  | Free | 2.5★ (490) | No | No | Jul 2026 |
Estimate the value of scrap precious metals using current market prices. Select the metal and its purity, then input the weight to get an instant valuation.
This app provides an instant mobile refrigerant charge calculator for HVACR applications. It supports various refrigerants and allows users to calculate the correct system charge based on superheat, subcooling, or airflow, along with environmental conditions.
This app is a powerful construction calculator designed for professionals working with dimensions. It offers a wide range of solutions for dimensional math, right angle calculations, area and volume, and special functions, helping to improve speed and accuracy in layouts, bids, and estimates.
Control your home's heating and cooling remotely, set schedules, and monitor energy usage to save money and energy. Integrates with smart home platforms for seamless control.
Control and monitor your HVAC or grow environment with intelligent ventilation. Access advanced programming, view real-time environmental data, and receive customizable alerts for optimal control.
This aviation calculator app offers 27 functions for navigation, fuel calculations, and conversions. It includes a versatile timer for tracking multiple time zones and performing countdowns with alerts. Designed for pilots, it simplifies complex flight planning and in-flight computations.
Access a vast database of HVAC models, manuals, and part lists to speed up your work. Utilize an AI-powered troubleshooting tool or connect with experienced technicians for real-time support.
This app connects wirelessly with compatible HVACR tools to help professionals troubleshoot, diagnose, and evaluate HVACR systems. It serves as a central hub for managing wireless tools and business solutions, linking your equipment to your jobs.
This app provides professional HVAC duct sizing and psychrometric calculations in a single tool. It offers detailed calculations for various duct types and materials, along with comprehensive humid air property analysis. Designed for HVAC professionals, it replaces traditional ductulators with accurate digital functionality.
This utility app helps HVAC engineers quickly calculate the recommended Thermaflex duct size for installations. Input project volume and friction loss to determine the optimal duct size based on established industry standards.
Control and monitor a range of Dyson home appliances, including vacuums, air purifiers, hair dryers, and lighting. Schedule cleaning, track air quality, access styling guides, and personalize your audio experience. Get expert help and integrate with smart home assistants.
Easily convert temperatures between Fahrenheit and Celsius. Access current, historical, and forecasted weather data for any city in both units simultaneously.
This app provides professional HVAC load calculations for contractors, offering three levels of accuracy from quick estimates to detailed Manual J calculations. It's designed for field use with an intuitive interface, offline capabilities, and professional report generation.
This tool helps outdoor workers stay safe by providing real-time heat index information and hourly forecasts specific to their location. It offers occupational safety recommendations and details on heat-related illnesses and their first aid.
Remotely monitor and control your Daikin, Amana, and Goodman heating and cooling systems from anywhere. Manage multiple locations, adjust settings, and receive important system notifications and energy usage insights.
This tool calculates humidity-related air properties with a calculator-like interface. It supports six key parameters and provides accurate results even under extreme conditions. Ideal for HVAC, cleanrooms, and industrial drying.
This mobile application provides HVACR service technicians with accurate refrigerant data on the go. It allows for quick system diagnostics and response by calculating pressure-temperature relationships, superheat, and subcooling. Supports various refrigerants, including newer HFOs and older HFCs/HCFCs.
This utility app calculates dew point, humidity, and wet bulb temperature with speed and accuracy. It's designed for weather, HVAC, and scientific applications, eliminating the need for manual calculations or physical tools.
Control your Toshiba air conditioner remotely from your smartphone. Adjust settings, set schedules, and customize temperature for optimal comfort, whether you're at home or on your way. Ensure your device is compatible before use.
Remotely monitor and control your heating and cooling systems from anywhere. Check current weather, view equipment runtimes, and receive alerts. Easily switch between home and away modes for optimal comfort and energy savings.