# HVAC RefCharge vs Contractor Estimate & Invoice

The clearest difference is update cadence: Contractor Estimate & Invoice at every 3 months against HVAC RefCharge's every 11 months. Contractor Estimate & Invoice also leads on review sentiment (46% vs 33%) and price ($7.99 vs $9.99). On ads, in-app purchases and monetization model there is nothing between them.

HVAC RefCharge costs $9.99 and Contractor Estimate & Invoice $7.99 up front. HVAC RefCharge sells 1 one-off in-app purchase and Contractor Estimate & Invoice sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

HVAC RefCharge ships an update every 11 months, Contractor Estimate & Invoice every 3 months. The most recent releases landed on November 1, 2026 and November 11, 2026 respectively.

## The numbers

| Metric | HVAC RefCharge | Contractor Estimate & Invoice |
| --- | --- | --- |
| Price | $9.99 | **$7.99** |
| Rating | — | **[3.2 (18 ratings)](https://appshunter.io/ios/app/contractor-estimate-and-invoice/id955265977/reviews)** |
| Number of ratings | — | **18** |
| Positive reviews | 33.3% of reviews | **45.8% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 3 months** |
| Monetization | Paid | Paid |
| Size | 6 MB | 133 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | +4 | 17+ |
| Developer | [Carmel Software Corporation](https://appshunter.io/developer/317970398) | [JZ Mobile LLC](https://appshunter.io/developer/390988405) |

## 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 |


### Contractor Estimate & Invoice

[App page](https://appshunter.io/ios/app/contractor-estimate-and-invoice/id955265977)

This app helps contractors manage their business by creating professional estimates and invoices. It includes scheduling, contact management, and financial tracking features, all stored locally on your device.

**Highlights:** Create professional estimates and invoices, Client-focused scheduling and reminders, Integrated contact management, Detailed financial tracking and P&L analysis, Offline data storage, Customizable document design

**Features:** Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Messages & Reminders | $3.99 | one-time |
| Document Manager | $3.99 | one-time |
| Estimates, Bids & Quotes | $4.99 | one-time |
| Auto Service Calls | $4.99 | one-time |
| Scheduler | $4.99 | one-time |
| Cloud Sync Secure Data Sharing | $6.99 | one-time |
| Profits Expenses & PDF Reports | $6.99 | one-time |
| All Productivity In-Apps | $9.99 | one-time |
| Mac User Full License | $19.99 | one-time |
| Craftsman NCE Cost Book | $24.99 | one-time |


## Frequently asked questions

### Is HVAC RefCharge free?

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

### Is Contractor Estimate & Invoice free?

Contractor Estimate & Invoice costs $7.99, and also offers in-app purchases.

### Do HVAC RefCharge or Contractor Estimate & Invoice have ads?

Neither HVAC RefCharge nor Contractor Estimate & Invoice shows ads.

### Which is updated more often, HVAC RefCharge or Contractor Estimate & Invoice?

HVAC RefCharge ships an update every 11 months, and Contractor Estimate & Invoice every 3 months. Most recently, HVAC RefCharge was updated on November 1, 2026 and Contractor Estimate & Invoice on November 11, 2026.

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