# Sizing US/CA vs ViGuide

The clearest difference is rating: ViGuide at 4.5 against Sizing US/CA's 3.2. ViGuide also leads on ads (none vs shown) and review sentiment (41% 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.

ViGuide holds the better App Store score, 4.5 against 3.2. That said, the two scores are not equally well evidenced: ViGuide has 199 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 41% of ViGuide's.

Sizing US/CA ships an update every 6 weeks, ViGuide every 5 weeks. The most recent releases landed on June 3, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Sizing US/CA | ViGuide |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.2 (13 ratings)](https://appshunter.io/ios/app/sizing-usca/id1420112805/reviews) | **[4.5 (199 ratings)](https://appshunter.io/ios/app/viguide/id1421720639/reviews)** |
| Number of ratings | 13 | **199** |
| Positive reviews | 11.1% of reviews | **40.5% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Every 5 weeks** |
| Monetization | Ad-supported | **Free** |
| Size | 27 MB | 1.5 GB |
| Requires iOS | **10.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Gastite Products LLC](https://appshunter.io/developer/668653608) | [Viessmann IT Service GmbH](https://appshunter.io/developer/1801739683) |

## 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


### ViGuide

[App page](https://appshunter.io/ios/app/viguide/id1421720639)

Streamline the process of commissioning Viessmann boilers with this user-friendly mobile application. It guides trained professionals through each step, ensuring a safe, efficient, and complete installation.

**Highlights:** Streamlined boiler commissioning, User-friendly mobile interface, Step-by-step guidance, Ensures complete and correct steps, Efficient installation process

**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 ViGuide free?

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

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

ViGuide is rated higher. Sizing US/CA averages 3.2 out of 5 from 13 ratings, while ViGuide averages 4.5 from 199 ratings.

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

Sizing US/CA shows ads; ViGuide does not.

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

Sizing US/CA ships an update every 6 weeks, and ViGuide every 5 weeks. Most recently, Sizing US/CA was updated on June 3, 2026 and ViGuide on September 23, 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.*