# iEngineer

> Comprehensive database of US and metric screw/bolt information with dimensions and properties. (iPhone/iPad app by Perfectly Simple Apps LLC.)

- Source: https://appshunter.io/ios/app/iengineer/id369825047 (this page in markdown: same URL + `.md`)
- Developer: [Perfectly Simple Apps LLC](https://appshunter.io/developer/357604157)
- Category: Reference, Utilities
- Price: Free with in-app purchases
- Rating: 4.50/5 from 191 App Store ratings · 159 written reviews indexed
- Age rating: 4+
- Requires: iOS 9.3 · 27 MB
- Languages: American English
- Released: 2010-05-04
- Data updated: 2026-07-31
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/iengineer/id369825047/reviews.md

## What is iEngineer?

iEngineer is the most comprehensive database of screw/bolt information that you can find anywhere.

US screws:
-93 different screws from #0 to 4”
-Dimensions for 9 standard head styles
-74 material grades including SAE, ASTM, and other materials

Metric Screws (available as in-app purchase):
-210 different metric screws from M1.0 to M100
-Dimensions for 10 standard head styles for ISO, DIN, BS, and ANSI standards where available
-86 material grades including 12 additional metric grades, SAE, ASTM, and other materials

Displayed values for both the US and Metric screws include:
-Standard dimensions
-Tap sizes
-Clearance hole sizes
-Material strength
-Recommended torque values
-Clamp force
-Shear force
-Head markings display
-3D model of head type
-Standard dimensions of head type

Other features:
-Drill chart with 523 drill bit sizes
-Fraction chart
-Copy and paste data values
-Fast and easy unit conversion
-Ability to show/hide material grades in the interface so you only see what is relevant to you

If you have any questions please contact us at support@perfectlysimpleapps.com

## Key features

- 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

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

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


## What do users think of iEngineer?

Overall sentiment: positive

**Pros**

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

**Cons**

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

**Commonly reported bugs**

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

**Most requested features**

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

## Recent user reviews (10 of 159)

All indexed reviews: https://appshunter.io/ios/app/iengineer/id369825047/reviews.md

### 5/5 — Great

*2026-02-21, version 2.4*

A lot of info in an easy to navigate way

### 5/5 — For everyday milwright work

*2025-10-23, version 2.4*

Im a service tech for an industrial consulting firm, use every day, very usefull and easy to use. can confirm avery torque i doubled checked were whitin 2% of calculation from our engineer

### 5/5 — Great reference

*2025-04-21, version 2.4*

I use this as my go to app. Very often.  Thanks for the effort. Nice and simple easy to use. A+++

### 5/5 — Machinist

*2025-01-15, version 2.4*

After retiring with 35 years as a machinist, I work on Harley’s and various other projects. This app is very handy to have on my phone. Saves so much time having the info I need readily at hand.

### 5/5 — Awesome app!

*2025-01-14*

This app is AWESOME, I’m a mechanical engineer and use this app all the time for anything fastener-related. I only wish this app was updated to better utilize larger, more modern phone displays. I have looked for a different more modern app to replace this one, and I’m convinced that one doesn’t exist.

### 1/5 — Communists

*2024-05-05, version 2.4*

Have to pay for commie sizes. What has this world come to. Money hungry pedophiles

### 5/5 — Excellent App

*2023-12-10*

Excellent app. I use it daily on the Shop Floor. The $1.99 upgrade for the metric information is well worth it.
If you work in Maintenance or the Machine Shop I highly recommend it. It’s a lot easier than digging that reference book out of your toolbox or going to the chart on the wall.

### 5/5 — Very useful

*2023-10-23, version 2.4*

Thank you, I really enjoy this app 😄

### 4/5 — Additional Feature Suggestions

*2023-05-25, version 2.4*

Nice application.  Please add tap drill chart and clearance hole fits.

### 5/5 — Works as advertised

*2022-10-28*

I use it a lot to see if things are in a ball park of right torque. Pretty helpful with automotive stuff too. A lot of people are complaining that the app doesn’t have a lot of extra functions but it works as advertised.

## Frequently asked questions about iEngineer

### What kind of information does iEngineer provide?

iEngineer offers a comprehensive database of screw and bolt information. This includes standard dimensions, material grades, strength properties, recommended torque values, clamp force, and shear force for both US and metric fasteners. It also features a detailed drill chart and unit conversion tools.

### Are metric screws included in the base app?

The base version of iEngineer includes an extensive database of US screws. Metric screws are available as an in-app purchase, offering a separate, comprehensive set of data for metric fasteners.

### What are the key features of iEngineer?

Key features include a vast database of US and metric screws/bolts with detailed specifications, head markings, 3D head models, a drill chart with over 500 sizes, fraction charts, and fast unit conversion. Users can also customize which material grades are displayed.

### How much does iEngineer cost?

The base iEngineer app is free to download and use, providing access to US screw data. Metric screw data is available through an in-app purchase. There are no advertisements within the app.

### Who would benefit from using iEngineer?

This app is designed for professionals and hobbyists alike, including engineers, mechanics, machinists, and DIY enthusiasts who require accurate and readily accessible information about screws and bolts for their projects. It simplifies the process of finding precise fastener specifications.

## Version history (last 5 releases)

### 2.4 — 2017-09-22

This update from Apple will improve the functionality of this app. No new features are included.

- Updated with modern iOS design
- iOS 11 compatibility

### 2.3 — 2014-02-02

- 45 New Materials
- New selection interface to change visibility of materials

### 2.2 — 2012-12-07

- Bug Fixes
- iPhone 5 and iOS 6 compatibility
- You can now easily restore your In App purchases

Due to some compatibility issues, this will be the last version to support iOS 4.  If you have a device that cannot be upgraded to iOS 5 or above (original iPhone, iPhone 3G, 1st and 2nd generation iPod Touch) you can continue to use the current version of iEngineer, but you will not receive any future updates.  Sync your device with iTunes to make a backup of this version.

### 2.1.1 — 2012-07-27

- iPad Retina Graphics
- Added "Unified Thread Standard" callout to US screws
- Bug Fixes

### 2.1 — 2012-03-17

-iPad Compatible!!
-Video Preview for In App Purchases
-Some user requests implemented and bug fixes

## Apps similar to iEngineer

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Flange Bolt Size & Torque](https://appshunter.io/ios/app/flange-bolt-size-and-torque/id1489122965) | 4.6 (361) | Free | Reference |
| [Miller Weld Setting Calculator](https://appshunter.io/ios/app/miller-weld-setting-calculator/id452837820) | 3.9 (78) | Free | Reference |
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## Related topics

[drill chart](https://appshunter.io/ios/topics/drill-chart) · [drill size charts](https://appshunter.io/ios/topics/drill-size-charts) · [3060clips](https://appshunter.io/ios/topics/3060clips)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-31.*