# Ref Tools vs Flux HVAC

The clearest difference is rating: Flux HVAC at 5.0 against Ref Tools's 3.9. Flux HVAC also leads on review sentiment (100% vs 58%). Ref Tools's advantage is ratings volume (52 vs 2). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Flux HVAC holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: Ref Tools has 52 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 58% of Ref Tools's written reviews are positive against 100% of Flux HVAC's.

## The numbers

| Metric | Ref Tools | Flux HVAC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (52 ratings)](https://appshunter.io/ios/app/ref-tools/id472312541/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/flux-hvac-tech-calculator/id6756405485/reviews)** |
| Number of ratings | **52** | 2 |
| Positive reviews | 57.6% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | — |
| Monetization | Free | Free |
| Size | 98 MB | 38 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Danfoss A/S](https://appshunter.io/developer/423984644) | [华 陆](https://appshunter.io/developer/1589633448) |

## 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


### Flux HVAC

[App page](https://appshunter.io/ios/app/flux-hvac-tech-calculator/id6756405485)

This professional toolkit helps HVAC technicians diagnose issues, charge systems accurately, and validate work with essential calculators. It offers offline functionality for superheat, subcooling, duct sizing, system performance, psychrometrics, and capacitor testing.

**Highlights:** Superheat and Subcooling Calculators, Duct Sizing with Visualizer, System Performance (BTU/Ton) Calculation, Psychrometric Calculations (RH%, Dew Point), Capacitor Test (Under Load), 100% Offline Functionality

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Ref Tools free?

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

### Is Flux HVAC free?

Flux HVAC is free to download, with no in-app purchases.

### Which has better reviews, Ref Tools or Flux HVAC?

Flux HVAC is rated higher. Ref Tools averages 3.9 out of 5 from 52 ratings, while Flux HVAC averages 5.0 from 2 ratings.

### Do Ref Tools or Flux HVAC have ads?

Neither Ref Tools nor Flux HVAC shows ads.

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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.*