# Sizing US/CA vs Rheem

The clearest difference is rating: Rheem at 4.6 against Sizing US/CA's 3.2. Rheem also leads on ads (none vs shown) and review sentiment (43% vs 11%). Sizing US/CA's advantage is iOS requirement (10.0 vs 16.0). On price, update cadence, 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.

Rheem holds the better App Store score, 4.6 against 3.2. That said, the two scores are not equally well evidenced: Rheem has 1.7K ratings behind it against 13, so its average is the more settled of the two. Written reviews point the same way: 11% of Sizing US/CA's written reviews are positive against 43% of Rheem's.

Sizing US/CA ships an update every 6 weeks, Rheem monthly. Both last shipped on October 16, 2026.

## The numbers

| Metric | Sizing US/CA | Rheem |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.2 (13 ratings)](https://appshunter.io/ios/app/sizing-usca/id1420112805/reviews) | **[4.6 (1.7K ratings)](https://appshunter.io/ios/app/rheem/id1604626837/reviews)** |
| Number of ratings | 13 | **1.7K** |
| Positive reviews | 11.1% of reviews | **42.9% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Monthly** |
| Monetization | Ad-supported | **Free** |
| Size | 27 MB | 109 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


### Rheem

[App page](https://appshunter.io/ios/app/rheem/id1604626837)

This app streamlines HVAC installation and service for contractors. It offers Bluetooth connectivity for system setup and troubleshooting, along with comprehensive support for product information, warranty tracking, and locating resources.

**Highlights:** Bluetooth setup and troubleshooting, System monitoring and status checks, Alarm diagnosis and history, Parts replacement guidance, Access to manuals and tech sheets, Warranty tracking and certificate sharing, Retailer and distributor locator

**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 Rheem free?

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

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

Rheem is rated higher. Sizing US/CA averages 3.2 out of 5 from 13 ratings, while Rheem averages 4.6 from 1.7K ratings.

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

Sizing US/CA shows ads; Rheem does not.

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

Sizing US/CA ships an update every 6 weeks, and Rheem monthly. Most recently, Sizing US/CA was updated on October 16, 2026 and Rheem on October 16, 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.*