# HVAC RefCharge vs ACOB Scanner

The clearest difference is price: ACOB Scanner at Free against HVAC RefCharge's $9.99. ACOB Scanner also leads on in-app purchases (none vs 1) and update cadence (every 5 weeks vs every 11 months). On ads and device support there is nothing between them.

ACOB Scanner is free to download; HVAC RefCharge costs $9.99 up front. HVAC RefCharge sells 1 one-off in-app purchase. ACOB Scanner asks for nothing beyond the download.

HVAC RefCharge ships an update every 11 months, ACOB Scanner every 5 weeks. The most recent releases landed on September 21, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | HVAC RefCharge | ACOB Scanner |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 5 weeks** |
| Monetization | Paid | — |
| Size | 22 MB | 30 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Carmel Software Corporation](https://appshunter.io/developer/317970398) | [ACOB](https://appshunter.io/developer/1807115895) |

## What reviewers say

### HVAC RefCharge

[App page](https://appshunter.io/ios/app/hvac-refcharge/id577005428)

This app helps HVAC technicians quickly calculate refrigerant superheat and subcool levels. It supports over 100 refrigerants and offers interactive adjustments for precise charging decisions. Features include atmospheric pressure adjustments and unit customization.

**Highlights:** Superheat and subcool calculations, Supports 100+ refrigerants, Interactive slider for adjustments, Atmospheric pressure compensation, Customizable input types, Project photo assignment, Email report generation, English/Metric unit display

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HVAC Equipment Locator | $9.99 | one-time |


### ACOB Scanner

[App page](https://appshunter.io/ios/app/acob-scanner/id6744330021)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is HVAC RefCharge free?

HVAC RefCharge costs $9.99, and also offers in-app purchases.

### Is ACOB Scanner free?

ACOB Scanner is free to download, with no in-app purchases.

### Do HVAC RefCharge or ACOB Scanner have ads?

Neither HVAC RefCharge nor ACOB Scanner shows ads.

### Which is updated more often, HVAC RefCharge or ACOB Scanner?

HVAC RefCharge ships an update every 11 months, and ACOB Scanner every 5 weeks. Most recently, HVAC RefCharge was updated on September 21, 2026 and ACOB Scanner on October 6, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*