RefrigCharge
iOS Universel / Utilitaires
Built for HVAC service techs and install crews who need subcool / superheat diagnosis on the roof - not a dashboard you log into.
WHAT IT DOES
Computes measured subcooling and superheat from your gauge readings, compares them against per-refrigerant target windows, and tells you whether the system is undercharged, overcharged, or showing airflow issues. Charge adjustment advice differs for TXV vs. piston / cap-tube metering, matching the field workflow.
REFRIGERANTS SUPPORTED
- R-410A
- R-22
- R-134a
- R-404A
- R-407C
INPUTS
- Refrigerant type (picker)
- Metering device (TXV or Piston / Cap Tube)
- Liquid line temperature
- Condensing saturation temperature
- Suction line temperature
- Evaporating saturation temperature
- °F or °C toggle
RETURNS
- Measured subcooling vs. target (color-coded: green within ±3°F, red outside)
- Measured superheat vs. target (color-coded)
- Diagnosis: undercharged, overcharged, normal, or airflow issue
- Charge adjustment advice: ADD, REMOVE, or CORRECT
- Adjustment basis: subcool for TXV, superheat for piston
WHY THIS APP, NOT THE FREE ONES
- Math is shown - measured minus target, with the per-refrigerant windows visible.
- Status at a glance - color-coded so you do not have to do mental arithmetic on the ladder.
- Works offline - RF-shielded basements, attics, and roofs. Always available.
- No login. No ads. No telemetry. No subscription.
PRICING
$4.99. Pay once, own it. Lifetime access on iPhone, iPad, and Mac via Family Sharing.
NOT A SUBSTITUTE FOR
The manufacturer's charging procedure for your specific equipment. The equipment data plate's nameplate charge. Calibrated gauge sets. This app gives you a directional read - verify against the OEM service manual before adjusting.
Quoi de neuf dans la dernière version ?
Added R-32 and R-454B (A2L low-GWP) refrigerant support for 2026 system charging.
