---
title: "RefrigCharge - Reviews, Revenue and Downloads in United States | Apple App Store"
description: "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 gau"
---

# RefrigCharge — United States
> R-454B · Subcool · Superheat

![RefrigCharge App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/88/5e/e8/885ee859-1406-b092-5e94-2934b783cdd0/AppIcon-0-0-1x_U007epad-0-1-85-220.png/434x0w.png)

**Developer:** [Shanghai Sheyuan Network Technology Co](https://apptail.io/developer/shanghai-sheyuan-network-technology-co-mkXe)
**Category:** Utilities
**Rating:** N/A (0 ratings)
**Price:** $4.99
**Bundle ID:** com.sy.refrigcharge
**Store:** Apple App Store
**Country:** United States
**Version:** 1.0.3 (released 2026-07-01)
**Original Release:** 2026-04-04
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id6761541500)
**AppTail Page:** [https://apptail.io/app/refrigcharge-jQkz/united-states](https://apptail.io/app/refrigcharge-jQkz/united-states)

## RefrigCharge Description
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.

## RefrigCharge Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/de/86/4d/de864ddc-bda1-ac72-7ca1-4aa8816f64e7/screenshot_iphone_1.jpg/1284x2778.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/0d/e6/ea/0de6eabf-bc9b-943d-e609-a1f418fa2019/screenshot_iphone_2.jpg/1284x2778.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/ff/22/5a/ff225ac0-1fad-fe9e-a9cc-221260ce5bc5/screenshot_iphone_3.jpg/1284x2778.png)








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