# Friedrich vs Digiduct

The clearest difference is monetization model: Friedrich at free against Digiduct's ad-supported. Friedrich also leads on ratings volume (53 vs 11) and iOS requirement (16.0 vs 26.2). On price, rating, update cadence and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.6 for Friedrich against 4.6 for Digiduct. Both are backed by a comparable volume of ratings — 53 and 11 respectively.

Friedrich ships an update monthly, Digiduct every 2 months. The most recent releases landed on October 7, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Friedrich | Digiduct |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (53 ratings)](https://appshunter.io/ios/app/friedrich/id6460458596/reviews) | [4.6 (11 ratings)](https://appshunter.io/ios/app/digiduct/id6738926359/reviews) |
| Number of ratings | **53** | 11 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | **Free** | Ad-supported |
| Size | 110 MB | 4 MB |
| Requires iOS | **16.0** | 26.2 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Rheem Manufacturing Company](https://appshunter.io/developer/853793269) | [Syska Hennessy Group](https://appshunter.io/developer/1782943081) |

## What reviewers say

### Friedrich

[App page](https://appshunter.io/ios/app/friedrich/id6460458596)

This app simplifies HVAC system installation, service, and troubleshooting for contractors. It offers Bluetooth connectivity for setup, diagnostics, and access to technical support resources like manuals and parts lists.

**Highlights:** Bluetooth setup for HVAC systems, System monitoring and status checks, Alarm diagnosis and history, Access to installation instructions and manuals, Parts list and technical sheet lookup, Warranty tracking and certificate sharing, Rebate and financing research

**Features:** Vision Pro support

**In-app purchases:** none


### Digiduct

[App page](https://appshunter.io/ios/app/digiduct/id6738926359)

This HVAC tool assists professionals with duct sizing calculations based on ASHRAE standards. It supports multiple duct shapes and offers intelligent features to ensure accurate and reliable designs for real-world scenarios.

**Highlights:** Duct sizing for rectangular, round, and flat oval ducts, Customizable dimensions with locked values, Duct location intelligence for context-aware sizing, Calculations based on CFM, pressure drop, or velocity, Alerts for exceeding pressure drop or velocity limits

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Friedrich free?

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

### Is Digiduct free?

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

### Which has better reviews, Friedrich or Digiduct?

Friedrich and Digiduct are both rated 4.6 out of 5 on the App Store, from 53 and 11 ratings respectively.

### Do Friedrich or Digiduct have ads?

Neither Friedrich nor Digiduct shows ads.

### Which is updated more often, Friedrich or Digiduct?

Friedrich ships an update monthly, and Digiduct every 2 months. Most recently, Friedrich was updated on October 7, 2026 and Digiduct on October 1, 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.*