# Plumbing Formulator vs Heating & Cooling HVAC Pro+

Plumbing Formulator and Heating & Cooling HVAC Pro+ both sit at 4.6 stars, but that hides the real split: 100% of Heating & Cooling HVAC Pro+'s written reviews are positive against 9% of Plumbing Formulator's. Heating & Cooling HVAC Pro+ also leads on in-app purchases (none vs 4) and ratings volume (46 vs 7). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. Plumbing Formulator sells 4 one-off in-app purchases. Heating & Cooling HVAC Pro+ asks for nothing beyond the download.

Heating & Cooling HVAC Pro+ holds the better App Store score, 4.8 against 4.6. That said, the two scores are not equally well evidenced: Heating & Cooling HVAC Pro+ has 46 ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 9% of Plumbing Formulator's written reviews are positive against 100% of Heating & Cooling HVAC Pro+'s.

Plumbing Formulator ships an update every 2 months, Heating & Cooling HVAC Pro+ every 6 weeks. The most recent releases landed on October 31, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Plumbing Formulator | Heating & Cooling HVAC Pro+ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (7 ratings)](https://appshunter.io/ios/app/plumbing-formulator/id303497783/reviews) | **[4.8 (46 ratings)](https://appshunter.io/ios/app/heating-and-cooling-hvac-pro-plus/id1356690113/reviews)** |
| Number of ratings | 7 | **46** |
| Positive reviews | 9.1% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | **Free** | Ad-supported |
| Size | 123 MB | 166 MB |
| Requires iOS | 18.6 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Historycentral.com](https://appshunter.io/developer/1744330560) | [Watsco, Inc.](https://appshunter.io/developer/510378878) |

## What reviewers say

### Plumbing Formulator

[App page](https://appshunter.io/ios/app/plumbing-formulator/id303497783)

This professional calculator app provides over 200 formulas, calculators, and reference materials for plumbers, HVAC technicians, and mechanical contractors. It covers a wide range of calculations for water flow, piping, drainage, water heaters, pumps, and more, all in one pocket-sized tool.

**Highlights:** Over 200 formulas and calculators, Water flow and supply calculations, Pipe and piping calculations, Drainage and venting calculations, Water heater and pump calculations, Reference charts and code books, Pipe cut list optimizer

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Version | $1.99 | one-time |
| Pro Purchase | $3.99 | one-time |
| Starter | $5.99 | one-time |
| Growth | $9.99 | one-time |


### Heating & Cooling HVAC Pro+

[App page](https://appshunter.io/ios/app/heating-and-cooling-hvac-pro-plus/id1356690113)

This app provides HVAC professionals with quick access to product information, tools, and support. It allows users to check pricing, availability, find locations, and manage warranty claims. Features include a PT calculator, duct calculators, and a flashlight tool for on-site work.

**Highlights:** View pricing and order status, Real-time product availability, Find branch locations and hours, Scan barcodes for product lookup, Submit warranty claims, Access spec sheets and diagrams, Live technical support chat, Inventory replenishment tool

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

**In-app purchases:** none


## Frequently asked questions

### Is Plumbing Formulator free?

Plumbing Formulator is free to download, with in-app purchases available.

### Is Heating & Cooling HVAC Pro+ free?

Heating & Cooling HVAC Pro+ is free to download, with no in-app purchases.

### Which has better reviews, Plumbing Formulator or Heating & Cooling HVAC Pro+?

Heating & Cooling HVAC Pro+ is rated higher. Plumbing Formulator averages 4.6 out of 5 from 7 ratings, while Heating & Cooling HVAC Pro+ averages 4.8 from 46 ratings.

### Do Plumbing Formulator or Heating & Cooling HVAC Pro+ have ads?

Neither Plumbing Formulator nor Heating & Cooling HVAC Pro+ shows ads.

### Which is updated more often, Plumbing Formulator or Heating & Cooling HVAC Pro+?

Plumbing Formulator ships an update every 2 months, and Heating & Cooling HVAC Pro+ every 6 weeks. Most recently, Plumbing Formulator was updated on October 31, 2026 and Heating & Cooling HVAC Pro+ on November 6, 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.*