# Ref Tools vs HVAC Tools PT Chart

The clearest difference is in-app purchases: Ref Tools at none against HVAC Tools PT Chart's 3. Ref Tools also leads on update cadence (every 5 weeks vs every 3 months) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. HVAC Tools PT Chart sells 3 in-app purchases, starting at $4.99 per month. Ref Tools asks for nothing beyond the download.

Ref Tools ships an update every 5 weeks, HVAC Tools PT Chart every 3 months. The most recent releases landed on October 17, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Ref Tools | HVAC Tools PT Chart |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (52 ratings)](https://appshunter.io/ios/app/ref-tools/id472312541/reviews)** | — |
| Number of ratings | **52** | — |
| Positive reviews | 57.6% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 3 months |
| Monetization | Free | — |
| Size | 98 MB | 9 MB |
| Requires iOS | **15.0** | 18 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Danfoss A/S](https://appshunter.io/developer/423984644) | [Karol Jaworski](https://appshunter.io/developer/1799974477) |

## What reviewers say

### Ref Tools

[App page](https://appshunter.io/ios/app/ref-tools/id472312541)

This app provides HVACR technicians with essential tools and information for field service. It includes refrigerant calculators, troubleshooting guides, product finders, and access to spare parts. Listen to educational podcasts to enhance your knowledge on the go.

**Highlights:** Refrigerant Slider for P/T calculations, Solenoid valve coil testing tool, Refrigeration system troubleshooting guide, Product data finder, Spare parts ordering, Low-GWP refrigerant comparison, TXV Superheat optimization, Educational podcasts

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

**In-app purchases:** none

**What reviewers like**

- 👍 Useful tool for HVAC/R techs
- 👍 Great idea for an app
- 👍 Best refrigeration and hvac app
- 👍 Useful App for HVACR
- 👍 Brilliant app

**What reviewers complain about**

- 🐛 Crashes instantly on launch
- 🐛 App won’t open on iPhone
- 🐛 Flashes up and disappears
- 🐛 Cannot open app
- 🐛 Immediately shuts off

**Reported bugs**

- CRASHED instantly on Mac Mini M4
- App won’t open on iPhone
- App flashes up and disappears
- Cannot open app
- Immediately shuts off since recent release

**Requested features**

- More residential AC information
- Troubleshooter for Residential & Commercial
- Add SP22 refrigerant
- Add R-11 refrigerant
- Add R-123 range down to 40 degrees


### HVAC Tools PT Chart

[App page](https://appshunter.io/ios/app/hvac-tools-pt-chart-gauge/id6760602879)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Gauge Pro | $4.99 | per month |
| Gauge Pro | $39.99 | per year |
| Gauge Pro | $39.99 | per year |


## Frequently asked questions

### Is Ref Tools free?

Ref Tools is free to download, with no in-app purchases.

### Is HVAC Tools PT Chart free?

HVAC Tools PT Chart is free to download, with in-app purchases available.

### Do Ref Tools or HVAC Tools PT Chart have ads?

Neither Ref Tools nor HVAC Tools PT Chart shows ads.

### Which is updated more often, Ref Tools or HVAC Tools PT Chart?

Ref Tools ships an update every 5 weeks, and HVAC Tools PT Chart every 3 months. Most recently, Ref Tools was updated on October 17, 2026 and HVAC Tools PT Chart on October 14, 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.*