# Sizing US/CA vs Diamondback Sizing Calculator

The clearest difference is ads: Diamondback Sizing Calculator at none against Sizing US/CA's shown. Sizing US/CA's advantage is update cadence (every 6 weeks vs every 5 months) and iOS requirement (10.0 vs 13.0). 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.

Sizing US/CA ships an update every 6 weeks, Diamondback Sizing Calculator every 5 months. The most recent releases landed on June 3, 2026 and May 18, 2026 respectively.

## The numbers

| Metric | Sizing US/CA | Diamondback Sizing Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.2 (13 ratings)](https://appshunter.io/ios/app/sizing-usca/id1420112805/reviews)** | — |
| Number of ratings | **13** | — |
| Positive reviews | 11.1% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 6 weeks** | Every 5 months |
| Monetization | Ad-supported | — |
| Size | 27 MB | 46 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Gastite Products LLC](https://appshunter.io/developer/668653608) | [CB Supplies Ltd.](https://appshunter.io/developer/1645869774) |

## 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


### Diamondback Sizing Calculator

[App page](https://appshunter.io/ios/app/diamondback-sizing-calculator/id1645869772)

**Features:** macOS Compatibility

**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 Diamondback Sizing Calculator free?

Diamondback Sizing Calculator is free to download, with no in-app purchases.

### Do Sizing US/CA or Diamondback Sizing Calculator have ads?

Sizing US/CA shows ads; Diamondback Sizing Calculator does not.

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

Sizing US/CA ships an update every 6 weeks, and Diamondback Sizing Calculator every 5 months. Most recently, Sizing US/CA was updated on June 3, 2026 and Diamondback Sizing Calculator on May 18, 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.*