# Rheem vs Diamondback Sizing Calculator

The clearest difference is update cadence: Rheem 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.

Rheem ships an update monthly, Diamondback Sizing Calculator every 5 months. The most recent releases landed on October 24, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Rheem | Diamondback Sizing Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (1.8K ratings)](https://appshunter.io/ios/app/rheem/id1604626837/reviews)** | — |
| Number of ratings | **1.8K** | — |
| Positive reviews | 40.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 5 months |
| Monetization | Free | — |
| Size | 109 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

### Rheem

[App page](https://appshunter.io/ios/app/rheem/id1604626837)

This app streamlines HVAC installation and service for contractors. It offers Bluetooth connectivity for system setup and troubleshooting, along with comprehensive support for product information, warranty tracking, and locating resources.

**Highlights:** Bluetooth setup and troubleshooting, System monitoring and status checks, Alarm diagnosis and history, Parts replacement guidance, Access to manuals and tech sheets, Warranty tracking and certificate sharing, Retailer and distributor locator

**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 Rheem free?

Rheem 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 Rheem or Diamondback Sizing Calculator have ads?

Neither Rheem nor Diamondback Sizing Calculator shows ads.

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

Rheem ships an update monthly, and Diamondback Sizing Calculator every 5 months. Most recently, Rheem was updated on October 24, 2026 and Diamondback Sizing Calculator on October 11, 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.*