# iEngineer vs Engineering Cookbook

The clearest difference is in-app purchases: Engineering Cookbook at none against iEngineer's 1. Engineering Cookbook also leads on iOS requirement (13.0 vs 26.0). iEngineer's advantage is update cadence (every 5 months vs every 34 months) and ratings volume (200 vs 6). On price, rating, ads and device support there is nothing between them.

Both are free to download. iEngineer sells 1 one-off in-app purchase. Engineering Cookbook asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.6 for iEngineer against 4.5 for Engineering Cookbook. That said, the two scores are not equally well evidenced: iEngineer has 200 ratings behind it against 6, so its average is the more settled of the two. Written reviews are what separate them: 86% of iEngineer's written reviews are positive against 73% of Engineering Cookbook's.

iEngineer ships an update every 5 months, Engineering Cookbook every 34 months. The most recent releases landed on October 29, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | iEngineer | Engineering Cookbook |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (200 ratings)](https://appshunter.io/ios/app/iengineer/id369825047/reviews)** | [4.5 (6 ratings)](https://appshunter.io/ios/app/engineering-cookbook/id376850735/reviews) |
| Number of ratings | **200** | 6 |
| Positive reviews | **85.5% of reviews** | 72.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 34 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 12 MB | 45 MB |
| Requires iOS | 26.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Perfectly Simple Apps LLC](https://appshunter.io/developer/357604157) | [Loren Cook Company](https://appshunter.io/developer/376850738) |

## What reviewers say

### iEngineer

[App page](https://appshunter.io/ios/app/iengineer/id369825047)

Access a vast database of screw and bolt information, including dimensions, material grades, and strength properties for both US and metric fasteners. Features a comprehensive drill chart, unit conversion, and customizable material displays.

**Highlights:** Extensive US screw database, Metric screw database (in-app purchase), Detailed dimensions and material grades, Strength, torque, and clamp force data, Head markings and 3D head models, Comprehensive drill chart, Unit conversion and data export

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Metric Screws | $1.99 | one-time |

**What reviewers like**

- 🚀 Easy to navigate
- 👍 Comprehensive information
- 🔧 Useful for everyday work
- ⚙️ Essential for engineers and machinists
- 💡 Saves time compared to physical references

**What reviewers complain about**

- 🐛 Occasional errors in torque and tensile strength data
- 💰 Metric information requires paid upgrade
- 🔍 Missing some thread types like NPT and BSPP

**Reported bugs**

- Metric portion not working for some users
- Camera access request for no apparent reason

**Requested features**

- Add tap drill chart
- Include clearance hole fits
- Improve UI for larger displays
- Add French language support


### 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


## Frequently asked questions

### Is iEngineer free?

iEngineer is free to download, with in-app purchases available.

### Is Engineering Cookbook free?

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

### Which has better reviews, iEngineer or Engineering Cookbook?

iEngineer is rated higher. iEngineer averages 4.6 out of 5 from 200 ratings, while Engineering Cookbook averages 4.5 from 6 ratings.

### Do iEngineer or Engineering Cookbook have ads?

Neither iEngineer nor Engineering Cookbook shows ads.

### Which is updated more often, iEngineer or Engineering Cookbook?

iEngineer ships an update every 5 months, and Engineering Cookbook every 34 months. Most recently, iEngineer was updated on October 29, 2026 and Engineering Cookbook on October 23, 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.*