# HVAC Toolkit Ultimate vs Dilution +

The clearest difference is price: Dilution + at $0.99 against HVAC Toolkit Ultimate's $59.99. HVAC Toolkit Ultimate's advantage is update cadence (every 6 months vs every 24 months) and device support (3 vs 1). On ads and in-app purchases there is nothing between them.

HVAC Toolkit Ultimate costs $59.99 and Dilution + $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

HVAC Toolkit Ultimate ships an update every 6 months, Dilution + every 24 months. The most recent releases landed on August 27, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | HVAC Toolkit Ultimate | Dilution + |
| --- | --- | --- |
| Price | $59.99 | **$0.99** |
| Rating | **[3.0 (4 ratings)](https://appshunter.io/ios/app/hvac-toolkit-ultimate/id391408247/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 40.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 24 months |
| Monetization | Paid | — |
| Size | 59 MB | 6 MB |
| Requires iOS | **13.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Carmel Software Corporation](https://appshunter.io/developer/317970398) | [Arpacore B.V.](https://appshunter.io/developer/1441928570) |

## What reviewers say

### HVAC Toolkit Ultimate

[App page](https://appshunter.io/ios/app/hvac-toolkit-ultimate/id391408247)

This comprehensive application offers a suite of tools for HVAC professionals, including load calculations, equipment tracking, refrigerant charts, duct and pipe sizing, and psychrometric analysis. It consolidates multiple functionalities into a single, powerful utility for field and office use.

**Highlights:** Residential load calculations, Equipment nameplate data tracking, Refrigerant pressure-temperature charts, Superheat and subcool calculations, Duct and pipe sizing analysis, Psychrometric calculations, Steam table property calculations

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

**In-app purchases:** none


### Dilution +

[App page](https://appshunter.io/ios/app/dilution-plus/id1548509209)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is HVAC Toolkit Ultimate free?

HVAC Toolkit Ultimate costs $59.99, with no in-app purchases.

### Is Dilution + free?

Dilution + costs $0.99, with no in-app purchases.

### Do HVAC Toolkit Ultimate or Dilution + have ads?

Neither HVAC Toolkit Ultimate nor Dilution + shows ads.

### Which is updated more often, HVAC Toolkit Ultimate or Dilution +?

HVAC Toolkit Ultimate ships an update every 6 months, and Dilution + every 24 months. Most recently, HVAC Toolkit Ultimate was updated on August 27, 2026 and Dilution + on September 23, 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.*