# Engineering Cookbook vs Carrier® Comm Lit

The clearest difference is review sentiment: Engineering Cookbook at 73% against Carrier® Comm Lit's 0%. Engineering Cookbook also leads on rating (4.5 vs 2.6). Carrier® Comm Lit's advantage is iOS requirement (5.1.1 vs 13.0). On price, ratings volume, 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.

Engineering Cookbook holds the better App Store score, 4.5 against 2.6. Both are backed by a comparable volume of ratings — 6 and 5 respectively. Written reviews point the same way: 73% of Engineering Cookbook's written reviews are positive against 0% of Carrier® Comm Lit's.

Engineering Cookbook ships an update every 34 months, Carrier® Comm Lit every 28 months. Both last shipped on November 6, 2026.

## The numbers

| Metric | Engineering Cookbook | Carrier® Comm Lit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (6 ratings)](https://appshunter.io/ios/app/engineering-cookbook/id376850735/reviews)** | [2.6 (5 ratings)](https://appshunter.io/ios/app/carrier-comm-lit/id620449513/reviews) |
| Number of ratings | **6** | 5 |
| Positive reviews | **72.7% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 34 months | **Every 28 months** |
| Monetization | Free | Free |
| Size | 45 MB | 33 MB |
| Requires iOS | 13.0 | **5.1.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Loren Cook Company](https://appshunter.io/developer/376850738) | [Carrier Corporation](https://appshunter.io/developer/542004889) |

## What reviewers say

### Engineering Cookbook

[App page](https://appshunter.io/ios/app/engineering-cookbook/id376850735)

A handy reference guide for mechanical designers, offering quick access to essential information on fan basics, system and duct design, motors, heating, refrigeration, and conversion factors.

**Highlights:** Fan Basics, System Design, Duct Design, Motors & Drives, Heating & Refrigeration, Formulas & Conversion Factors

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

**In-app purchases:** none


### Carrier® Comm Lit

[App page](https://appshunter.io/ios/app/carrier-comm-lit/id620449513)

Access technical documents for Carrier® products directly from your mobile device. Filter searches by document type and status to find current or non-current information.

**Highlights:** Search technical documents, Filter by document type, Filter by document status, Access from mobile device, Find current and non-current documents

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Engineering Cookbook free?

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

### Is Carrier® Comm Lit free?

Carrier® Comm Lit is free to download, with no in-app purchases.

### Which has better reviews, Engineering Cookbook or Carrier® Comm Lit?

Engineering Cookbook is rated higher. Engineering Cookbook averages 4.5 out of 5 from 6 ratings, while Carrier® Comm Lit averages 2.6 from 5 ratings.

### Do Engineering Cookbook or Carrier® Comm Lit have ads?

Neither Engineering Cookbook nor Carrier® Comm Lit shows ads.

### Which is updated more often, Engineering Cookbook or Carrier® Comm Lit?

Engineering Cookbook ships an update every 34 months, and Carrier® Comm Lit every 28 months. Most recently, Engineering Cookbook was updated on November 6, 2026 and Carrier® Comm Lit on November 6, 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.*