# ViGuide vs Diamondback Sizing Calculator

The clearest difference is update cadence: ViGuide at every 5 weeks against Diamondback Sizing Calculator's every 5 months. Diamondback Sizing Calculator's advantage is iOS requirement (13.0 vs 16.0). On price, ads, 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 ships an update every 5 weeks, Diamondback Sizing Calculator every 5 months. The most recent releases landed on September 23, 2026 and May 18, 2026 respectively.

## The numbers

| Metric | ViGuide | Diamondback Sizing Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (199 ratings)](https://appshunter.io/ios/app/viguide/id1421720639/reviews)** | — |
| Number of ratings | **199** | — |
| Positive reviews | 40.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 5 months |
| Monetization | Free | — |
| Size | 1.5 GB | 46 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Viessmann IT Service GmbH](https://appshunter.io/developer/1801739683) | [CB Supplies Ltd.](https://appshunter.io/developer/1645869774) |

## What reviewers say

### 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


### 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 ViGuide free?

ViGuide 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 ViGuide or Diamondback Sizing Calculator have ads?

Neither ViGuide nor Diamondback Sizing Calculator shows ads.

### Which is updated more often, ViGuide or Diamondback Sizing Calculator?

ViGuide ships an update every 5 weeks, and Diamondback Sizing Calculator every 5 months. Most recently, ViGuide was updated on September 23, 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.*