HVAC Superheat & Subcooling
PT Chart and Charge Verdicts
$2.99
Offline HVAC charge verdicts plus saved service cards, visit history, and recorded comparisons for field notes.
HVAC Charge Check is an offline field calculator for service techs who need a fast refrigerant charge verdict on a live call.
Use it for:
• Superheat checks on fixed-orifice, piston, and cap-tube systems
• Subcooling checks on TXV and EEV systems
• Common refrigerants including R-410A, R-22, R-32, R-454B, R-407C, and R-134a
• Pressure-temperature reference for R-410A, R-22, R-32, R-454B, R-407C, and R-134a
• Clear Add, Hold, or Recover verdicts from field readings
• Save local service cards with unit, visit, date, readings, verdict, and optional technician note
• Compare a later card with the previous matching visit using descriptive reading changes
• Copy a complete service note for your own field records
Why techs keep it on the truck:
• Opens straight to the charge workflow
• No account, no ads, no subscription, and no bulky HVAC suite
• Works offline in attics, basements, rooftops, and mechanical rooms
• Keeps readings and service cards on the device
HVAC Charge Check is a field utility, not a replacement for manufacturer charging procedures. Stabilize airflow and load, then follow equipment documentation when available.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Save service readings in named service cards, keep initial and follow-up visits together, compare recorded changes, and copy a complete service note. Comparisons are descriptive and do not diagnose a fault or approve a charge.
The developer, 光 杨, 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 Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 光 杨
- Size
- 1.8 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Guang Yang
