# Carrier® Service Technician vs Sizing US/CA

The clearest difference is rating: Carrier® Service Technician at 4.1 against Sizing US/CA's 3.2. Carrier® Service Technician also leads on ads (none vs shown) and review sentiment (31% vs 11%). Sizing US/CA's advantage is iOS requirement (10.0 vs 15.1). On price, in-app purchases and device support 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 3.2. That said, the two scores are not equally well evidenced: Carrier® Service Technician has 108 ratings behind it against 13, so its average is the more settled of the two. Written reviews point the same way: 31% of Carrier® Service Technician's written reviews are positive against 11% of Sizing US/CA's.

Carrier® Service Technician ships an update fortnightly, Sizing US/CA every 6 weeks. Both last shipped on October 24, 2026.

## The numbers

| Metric | Carrier® Service Technician | Sizing US/CA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (108 ratings)](https://appshunter.io/ios/app/carrier-service-technician/id1123086541/reviews)** | [3.2 (13 ratings)](https://appshunter.io/ios/app/sizing-usca/id1420112805/reviews) |
| Number of ratings | **108** | 13 |
| Positive reviews | **31.4% of reviews** | 11.1% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Fortnightly** | Every 6 weeks |
| Monetization | **Free** | Ad-supported |
| Size | 176 MB | 27 MB |
| Requires iOS | 15.1 | **10.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Carrier Corporation](https://appshunter.io/developer/542004889) | [Gastite Products LLC](https://appshunter.io/developer/668653608) |

## What reviewers say

### 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


### Sizing US/CA

[App page](https://appshunter.io/ios/app/sizing-usca/id1420112805)

This utility app helps installers determine the correct size of flexible gas piping for their projects. It calculates the appropriate pipe size based on gas type, tubing length, supply pressure, and flow capacity. Users can also access installation guides and product information.

**Highlights:** Flexible gas pipe sizing, US and CA location selector, Automatic value adjustment, Certification card access, Installation guide viewer, Product search, Direct contact with developer

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Carrier® Service Technician free?

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

### Is Sizing US/CA free?

Sizing US/CA is free to download, with no in-app purchases.

### Which has better reviews, Carrier® Service Technician or Sizing US/CA?

Carrier® Service Technician is rated higher. Carrier® Service Technician averages 4.1 out of 5 from 108 ratings, while Sizing US/CA averages 3.2 from 13 ratings.

### Do Carrier® Service Technician or Sizing US/CA have ads?

Sizing US/CA shows ads; Carrier® Service Technician does not.

### Which is updated more often, Carrier® Service Technician or Sizing US/CA?

Carrier® Service Technician ships an update fortnightly, and Sizing US/CA every 6 weeks. Most recently, Carrier® Service Technician was updated on October 24, 2026 and Sizing US/CA on October 24, 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.*