Sizing US/CA vs ViGuide
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sizing US/CA
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.
- Flexible gas pipe sizing
- US and CA location selector
- Automatic value adjustment
- Certification card access
- Installation guide viewer
- Product search
- Direct contact with developer
Read full descriptionHide full description
Size Gastite® and FlashShield™ flexible gas piping with this convenient and easy-to-use application for the iPhone. This app allows flexible gas pipe installers to determine the appropriate size Gastite pipe recommended for the installation at hand. Based on the project’s gas type, length of tubing run, supply pressure, pressure drop, and flow capacity – the app will calculate the appropriate size Gastite/FlashShield CSST for your application. Features : Includes a location selector for US and CA Scroll wheel automatically adjusts depending on values selected Find your certification card to link a digital version to your device FAQs View the latest Design and Installation Guide Search for Gastite and FlashShield products Contact Page submits questions and requests directly to Gastite The Gastite and FlashShield flexible gas piping systems are designed and warranted to provide sufficient gas volume and pressure for proper appliance performance using the appropriate sizing tables and methods detailed in the Design and Installation Guide and this Mobile Sizing App. Accordingly, the design pressure loss on the Gastite and FlashShield piping system under maximum probable flow conditions, from the point of delivery to the inlet connection of the equipment shall be such that the supply pressure at the equipment is greater than the minimum pressure required for proper equipment operation. Minimum Requirements - iOS version 8
ViGuide
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.
- Streamlined boiler commissioning
- User-friendly mobile interface
- Step-by-step guidance
- Ensures complete and correct steps
- Efficient installation process
Read full descriptionHide full description
ViGuide - the best way to commission a Viessmann boiler • Please note this app is intended only for trained professionals. If you are not certified to install and commission a Viessmann product, please call your local installer or contact us to help you find a Viessmann partner in your area. • It’s time for a new start We have completely streamlined boiler commissioning and moved the process to a user-friendly mobile app. In a couple of simple steps, ViGuide will safely guide you through the process of commissioning a Viessmann boiler. Even you are new to the Viessmann boiler model, the simplified app allows you to carry out the steps with ease, as efficiently as possible and in less time. The app will guide you step-by-step through the commissioning process and thus ensures that all necessary commissioning steps are carried out completely and in the correct order.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Sizing US/CA | ViGuide |
|---|---|---|
| Price | Free | Free |
| Rating | 3.2 (13 ratings) | 4.5 (199 ratings) — better |
| Positive reviews | 11.1% of reviews | 40.5% of reviews — better |
| Number of ratings | 13 | 199 — better |
| Update frequency | Every 6 weeks | Every 5 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 10.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 27 MB | 1.5 GB |
| Age rating | 17+ | 4+ |
| Developer | Gastite Products LLC | Viessmann IT Service GmbH |
Customer experience
Sizing US/CA
ViGuide
In-app purchases
Sizing US/CA
No in-app purchases
ViGuide
No in-app purchases
Questions
Is Sizing US/CA free?
Is ViGuide free?
Which has better reviews, Sizing US/CA or ViGuide?
Do Sizing US/CA or ViGuide have ads?
Which is updated more often, Sizing US/CA or ViGuide?
Other comparisons
