# Ref Tools vs SuperCool Slide Rule HVAC

The clearest difference is rating: SuperCool Slide Rule HVAC at 4.2 against Ref Tools's 3.9. SuperCool Slide Rule HVAC also leads on review sentiment (66% vs 58%) and ratings volume (185 vs 52). 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.

SuperCool Slide Rule HVAC holds the better App Store score, 4.2 against 3.9. Both are backed by a comparable volume of ratings — 52 and 185 respectively. Written reviews point the same way: 58% of Ref Tools's written reviews are positive against 66% of SuperCool Slide Rule HVAC's.

## The numbers

| Metric | Ref Tools | SuperCool Slide Rule HVAC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (52 ratings)](https://appshunter.io/ios/app/ref-tools/id472312541/reviews) | **[4.2 (185 ratings)](https://appshunter.io/ios/app/supercool-slide-rule-hvac/id1193020259/reviews)** |
| Number of ratings | 52 | **185** |
| Positive reviews | 57.6% of reviews | **66.1% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | — |
| Monetization | Free | Free |
| Size | 98 MB | 38 MB |
| Requires iOS | 15.0 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Danfoss A/S](https://appshunter.io/developer/423984644) | [Designstein, llc](https://appshunter.io/developer/1193020258) |

## 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


### SuperCool Slide Rule HVAC

[App page](https://appshunter.io/ios/app/supercool-slide-rule-hvac/id1193020259)

This app offers a comprehensive suite of tools for HVAC technicians. It provides interactive guides, step-by-step repair instructions, and calculators for various HVAC calculations including superheat, subcooling, and duct sizing.

**Highlights:** Superheat & Subcooling charging, Duct sizing & layout calculator, Compressor windings troubleshooter, HVAC conversions, Capacitor calculations, Airflow troubleshooting

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Great HVAC tool
- 👍 Informative slide rule
- 👍 Helpful for new techs
- 👍 Quick and simple
- 👍 Easy to use

**What reviewers complain about**

- 🐛 Trial period issues
- 🐛 App expires frequently
- 🐛 Requires re-download
- 🐛 Not worth the trouble
- 🐛 App messed up

**Reported bugs**

- App expires and stops working
- Requires constant uninstall/reinstall
- App is scrambled and unusable
- Superheat and subcooling chart scrambled
- Paid version still prompts for payment/trial expired

**Requested features**

- Update with R454B
- Update with R32
- Add R421a refrigerant
- Add R427a refrigerant
- Add R744/R290/R1270 refrigerants


## Frequently asked questions

### Is Ref Tools free?

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

### Is SuperCool Slide Rule HVAC free?

SuperCool Slide Rule HVAC is free to download, with no in-app purchases.

### Which has better reviews, Ref Tools or SuperCool Slide Rule HVAC?

SuperCool Slide Rule HVAC is rated higher. Ref Tools averages 3.9 out of 5 from 52 ratings, while SuperCool Slide Rule HVAC averages 4.2 from 185 ratings.

### Do Ref Tools or SuperCool Slide Rule HVAC have ads?

Neither Ref Tools nor SuperCool Slide Rule 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.*