# HVAC ToolKit vs SprinkCalc Pro

The clearest difference is price: SprinkCalc Pro at Free against HVAC ToolKit's $9.99. SprinkCalc Pro also leads on update cadence (monthly vs every 3 months). HVAC ToolKit's advantage is in-app purchases (none vs 2) and device support (3 vs 1). On ads there is nothing between them.

SprinkCalc Pro is free to download; HVAC ToolKit costs $9.99 up front. SprinkCalc Pro sells 2 in-app purchases, starting at $1.99 per 7 days. HVAC ToolKit asks for nothing beyond the download.

HVAC ToolKit ships an update every 3 months, SprinkCalc Pro monthly. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | HVAC ToolKit | SprinkCalc Pro |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/hvac-toolkit/id1623246775/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Paid | — |
| Size | 60 MB | 19 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Mohamad Jaber](https://appshunter.io/developer/1623246777) | [Ersel Tarhan](https://appshunter.io/developer/1093545232) |

## What reviewers say

### HVAC ToolKit

[App page](https://appshunter.io/ios/app/hvac-toolkit/id1623246775)

This application provides HVAC engineers with tools for design checks and quick calculations. It offers various calculators for ducting friction, pipe sizing, ventilation, and heat load estimations, with clear instructions and formulas. Users can switch between metric and imperial units, and English or Arabic languages.

**Highlights:** Friction loss calculations, Pipe sizing tools, Ventilation and pressurization calculators, Heat load and pump head estimations, Metric/Imperial unit support, English/Arabic language options

**Features:** macOS Compatibility

**In-app purchases:** none


### SprinkCalc Pro

[App page](https://appshunter.io/ios/app/sprinkcalc-pro-fire-sprinkler/id6761716466)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $1.99 | per 7 days |
| Annual Premium | $19.99 | per year |


## Frequently asked questions

### Is HVAC ToolKit free?

HVAC ToolKit costs $9.99, with no in-app purchases.

### Is SprinkCalc Pro free?

SprinkCalc Pro is free to download, with in-app purchases available.

### Do HVAC ToolKit or SprinkCalc Pro have ads?

Neither HVAC ToolKit nor SprinkCalc Pro shows ads.

### Which is updated more often, HVAC ToolKit or SprinkCalc Pro?

HVAC ToolKit ships an update every 3 months, and SprinkCalc Pro monthly. Most recently, HVAC ToolKit was updated on November 3, 2026 and SprinkCalc Pro on November 5, 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.*