About this app
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 • Saved job checks for local notes 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 saved job checks 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.
Latest release
What’s New
Updated the App Store listing to better reflect the app's offline PT chart and field verdict workflow.
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Aug 27, 2026 · 1:25 AM $2.99
Screenshots
