CoolCalc - HVAC Tools
Superheat, PT chart & reports
About
This offline toolkit for service technicians provides essential HVAC calculations, job documentation, and professional PDF reporting. It supports A2L refrigerants and prioritizes user privacy with no account or cloud storage required.
What's New in CoolCalc
1.5.2
October 26, 2026
From the first reading to the finished service report, CoolCalc keeps your HVAC workflow moving. Check PT and charge values, size ducts, explore airflow and diagnostic tools, and turn job notes into a clear PDF. This update makes PT Chart, Charge Check, and Duct Sizer easier to start with example inputs, clearer required fields, and better input feedback. It also refines the Pro upgrade experience and purchase details.
MoreSubscriptions & In-App Purchases
CoolCalc Pro Monthly
All Pro tools, reports & references
Developer apps
FAQ
Does CoolCalc have ads?
No, CoolCalc is ad-free. The app is built with a focus on providing a seamless user experience without interruptions from advertisements.
What is the price of CoolCalc?
CoolCalc is free to download and use for its core features. An optional Pro upgrade is available for unlimited jobs, PDF exports, and full refrigerant reference.
What are the CoolCalc Pro subscription options?
CoolCalc Pro offers a monthly subscription for $9.99/month or a yearly subscription for $59.99/year, which includes a 3-day free trial.
Can I use CoolCalc offline?
Yes, CoolCalc is designed to be an offline HVAC field toolkit. All calculations, documentation, and reporting can be done without an internet connection.
What refrigerants does CoolCalc support?
CoolCalc supports a wide range of refrigerants, including A2L refrigerants like R-32 and R-454B, as well as common ones like R-410A, R-22, and R-134a.
How often is CoolCalc updated?
The latest version of CoolCalc is 1.4.0, last updated on October 7, 2026. Updates typically focus on adding new features, improving performance, and ensuring compatibility with the latest refrigerant transition guidelines.
What devices does CoolCalc support?
Currently, CoolCalc is supported on iPhone devices. The app is designed for mobile use in the field.
What is the age rating for CoolCalc?
CoolCalc has an age rating of 4+. This indicates it is suitable for users of all ages and does not contain mature content.
