# Sizing US/CA vs BluArch

The clearest difference is rating: BluArch at 4.8 against Sizing US/CA's 3.2. BluArch also leads on ads (none vs shown) and monetization model (free vs ad-supported). Sizing US/CA's advantage is iOS requirement (10.0 vs 16.0). On price, ratings volume, update cadence and in-app purchases there is nothing between them.

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

BluArch holds the better App Store score, 4.8 against 3.2. Both are backed by a comparable volume of ratings — 13 and 24 respectively.

Sizing US/CA ships an update every 6 weeks, BluArch monthly. The most recent releases landed on September 30, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Sizing US/CA | BluArch |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.2 (13 ratings)](https://appshunter.io/ios/app/sizing-usca/id1420112805/reviews) | **[4.8 (24 ratings)](https://appshunter.io/ios/app/bluarch/id1622231631/reviews)** |
| Number of ratings | 13 | **24** |
| Positive reviews | 11.1% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Monthly** |
| Monetization | Ad-supported | **Free** |
| Size | 27 MB | 110 MB |
| Requires iOS | **10.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Gastite Products LLC](https://appshunter.io/developer/668653608) | [Rheem Manufacturing Company](https://appshunter.io/developer/853793269) |

## What reviewers say

### 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


### BluArch

[App page](https://appshunter.io/ios/app/bluarch/id1622231631)

This app simplifies HVAC system installation and servicing for contractors. It uses Bluetooth to connect with eligible air systems, allowing for quick setup, monitoring of operating parameters, and easy troubleshooting of alarms and system status directly from a phone.

**Highlights:** Bluetooth system setup, Monitor operating parameters, Verify system setup, Diagnose alarms, Step-by-step parts replacement

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Sizing US/CA free?

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

### Is BluArch free?

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

### Which has better reviews, Sizing US/CA or BluArch?

BluArch is rated higher. Sizing US/CA averages 3.2 out of 5 from 13 ratings, while BluArch averages 4.8 from 24 ratings.

### Do Sizing US/CA or BluArch have ads?

Sizing US/CA shows ads; BluArch does not.

### Which is updated more often, Sizing US/CA or BluArch?

Sizing US/CA ships an update every 6 weeks, and BluArch monthly. Most recently, Sizing US/CA was updated on September 30, 2026 and BluArch on October 6, 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.*