# Ref Tools vs Carrier® Service Technician

Ref Tools and Carrier® Service Technician both sit at 3.9 stars, but that hides the real split: 58% of Ref Tools's written reviews are positive against 32% of Carrier® Service Technician's. Carrier® Service Technician's advantage is update cadence (fortnightly vs every 6 weeks). On price, rating, ratings volume 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.

Carrier® Service Technician holds the better App Store score, 4.1 against 3.9. Both are backed by a comparable volume of ratings — 52 and 108 respectively. Written reviews complicate that: 58% of Ref Tools's written reviews are positive against 32% of Carrier® Service Technician's, so the app with the better star average is not the one people write more warmly about.

Ref Tools ships an update every 6 weeks, Carrier® Service Technician fortnightly. The most recent releases landed on September 19, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Ref Tools | Carrier® Service Technician |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (52 ratings)](https://appshunter.io/ios/app/ref-tools/id472312541/reviews) | **[4.1 (108 ratings)](https://appshunter.io/ios/app/carrier-service-technician/id1123086541/reviews)** |
| Number of ratings | 52 | **108** |
| Positive reviews | **57.6% of reviews** | 32.4% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Fortnightly** |
| Monetization | Free | Free |
| Size | 98 MB | 174 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Danfoss A/S](https://appshunter.io/developer/423984644) | [Carrier Corporation](https://appshunter.io/developer/542004889) |

## 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


### Carrier® Service Technician

[App page](https://appshunter.io/ios/app/carrier-service-technician/id1123086541)

This app helps HVAC/R technicians quickly identify and locate necessary parts for repairs on any equipment, whether for warranty or non-warranty services. It offers advanced tools for troubleshooting, system calculations, and accessing technical documentation, all from the job site.

**Highlights:** AI Assistant for troubleshooting, System Capacity Calculator, Intelligent Equipment Search, Parts Identification & Cross-Reference, Warranty & Service History Lookup, Nearest Parts Center Locator, Technical Literature Access

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

**In-app purchases:** none


## Frequently asked questions

### Is Ref Tools free?

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

### Is Carrier® Service Technician free?

Carrier® Service Technician is free to download, with no in-app purchases.

### Which has better reviews, Ref Tools or Carrier® Service Technician?

Carrier® Service Technician is rated higher. Ref Tools averages 3.9 out of 5 from 52 ratings, while Carrier® Service Technician averages 4.1 from 108 ratings.

### Do Ref Tools or Carrier® Service Technician have ads?

Neither Ref Tools nor Carrier® Service Technician shows ads.

### Which is updated more often, Ref Tools or Carrier® Service Technician?

Ref Tools ships an update every 6 weeks, and Carrier® Service Technician fortnightly. Most recently, Ref Tools was updated on September 19, 2026 and Carrier® Service Technician on September 21, 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.*