# Ruud vs Diamondback Sizing Calculator

The clearest difference is update cadence: Ruud at monthly against Diamondback Sizing Calculator's every 5 months. Diamondback Sizing Calculator's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 16.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Ruud ships an update monthly, Diamondback Sizing Calculator every 5 months. The most recent releases landed on September 24, 2026 and May 18, 2026 respectively.

## The numbers

| Metric | Ruud | Diamondback Sizing Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (1.1K ratings)](https://appshunter.io/ios/app/ruud/id1608918835/reviews)** | — |
| Number of ratings | **1.1K** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 5 months |
| Monetization | Free | — |
| Size | 112 MB | 46 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Rheem Manufacturing Company](https://appshunter.io/developer/853793269) | [CB Supplies Ltd.](https://appshunter.io/developer/1645869774) |

## What reviewers say

### Ruud

[App page](https://appshunter.io/ios/app/ruud/id1608918835)

This app streamlines HVAC installation, service, and support for contractors. It offers Bluetooth connectivity for system setup and troubleshooting, along with access to product information, warranty tracking, and dealer locators.

**Highlights:** Bluetooth setup and troubleshooting, System operating parameter monitoring, Alarm diagnosis and history, Access installation instructions and manuals, Track warranty information, Locate retailers and distributors, Find rebate and financing information

**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 Ruud free?

Ruud 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 Ruud or Diamondback Sizing Calculator have ads?

Neither Ruud nor Diamondback Sizing Calculator shows ads.

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

Ruud ships an update monthly, and Diamondback Sizing Calculator every 5 months. Most recently, Ruud was updated on September 24, 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.*