# Ref Tools vs Complex Number Cruncher

The clearest difference is rating: Complex Number Cruncher at 4.3 against Ref Tools's 3.9. Complex Number Cruncher also leads on iOS requirement (10.3 vs 15.0). Ref Tools's advantage is ratings volume (52 vs 4). On price, review sentiment, update cadence and ads there is nothing between them.

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

Complex Number Cruncher holds the better App Store score, 4.3 against 3.9. That said, the two scores are not equally well evidenced: Ref Tools has 52 ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 58% of Ref Tools's written reviews are positive against 50% of Complex Number Cruncher's, so the app with the better star average is not the one people write more warmly about.

Ref Tools ships an update every 5 weeks, Complex Number Cruncher every 2 months. The most recent releases landed on October 1, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Ref Tools | Complex Number Cruncher |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (52 ratings)](https://appshunter.io/ios/app/ref-tools/id472312541/reviews) | **[4.3 (4 ratings)](https://appshunter.io/ios/app/complex-number-cruncher/id1046399105/reviews)** |
| Number of ratings | **52** | 4 |
| Positive reviews | **57.6% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 2 months |
| Monetization | Free | Free |
| Size | 98 MB | 16 MB |
| Requires iOS | 15.0 | **10.3** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Danfoss A/S](https://appshunter.io/developer/423984644) | [Neil Woodcock](https://appshunter.io/developer/836792867) |

## 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


### Complex Number Cruncher

[App page](https://appshunter.io/ios/app/complex-number-cruncher/id1046399105)

Perform calculations with complex numbers. Input real and imaginary parts or modulus and argument to find sums, differences, products, or quotients.

**Highlights:** Complex number calculations, Sum, difference, product, quotient, Real and imaginary input, Modulus and argument input, Automatic result calculation

**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 Complex Number Cruncher free?

Complex Number Cruncher is free to download, with no in-app purchases.

### Which has better reviews, Ref Tools or Complex Number Cruncher?

Complex Number Cruncher is rated higher. Ref Tools averages 3.9 out of 5 from 52 ratings, while Complex Number Cruncher averages 4.3 from 4 ratings.

### Do Ref Tools or Complex Number Cruncher have ads?

Neither Ref Tools nor Complex Number Cruncher shows ads.

### Which is updated more often, Ref Tools or Complex Number Cruncher?

Ref Tools ships an update every 5 weeks, and Complex Number Cruncher every 2 months. Most recently, Ref Tools was updated on October 1, 2026 and Complex Number Cruncher on September 20, 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.*