FieldCalc

HVAC/R Field Calculator

Free · Designed for iPad. Not verified for macOS.

Every daily HVAC calculation in one fast, offline app. PT chart, superheat, subcooling, duct sizing, and sensible load — with instant gauge readouts. No subscription. FieldCalc is the only calculator an HVAC/R technician needs on a service call. Every daily calculation in one fast, modern, fully offline app — no subscription, no clutter. CALCULATIONS - PT Chart — saturation pressure and temperature for R-410A, R-32, R-22, R-134a, and R-407C, with instant analog gauge readout - Superheat — suction line superheat with flooding warnings - Subcooling — liquid line subcooling with flash gas warnings - Duct Sizer — equal-friction round and rectangular duct sizing (ACCA Manual D / ASHRAE), with velocity limit warnings - Delta-T / Sensible Load — sensible BTU/hr and required airflow, with tonnage and metric conversions WHY FIELDCALC - Works 100% offline — no signal needed on the roof or in the basement - Imperial and metric units on every screen - Modern, high-contrast interface built for the field - Fast — open, calculate, done - No account, no subscription Built on trusted engineering sources: CoolProp thermodynamic data, ACCA Manual D, and ASHRAE Fundamentals. FieldCalc is a reference tool for qualified HVAC/R professionals. Always verify results against equipment manufacturer specifications and applicable codes.

Ratings & Reviews

  • This app hasn’t received enough ratings or reviews to display an overview.

The developer, Marwane Tchassama, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Identifiers

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Identifiers
    • Usage Data

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • Marwane Tchassama
Size
  • 4.9 MB
Category
  • Utilities
Compatibility
Requires iOS 17.0 or later.
  • iPhone
    Requires iOS 17.0 or later.
  • iPad
    Requires iPadOS 17.0 or later.
  • Mac
    Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
  • English
Age Rating
4+
Copyright
  • © 2026 Marodev
  • Privacy Policy

    • More by Marwane Tchassama