# iEngineer vs Engineering Unit Converter

The clearest difference is update cadence: Engineering Unit Converter at monthly against iEngineer's every 5 months. Engineering Unit Converter also leads on iOS requirement (11.2 vs 26.0). iEngineer's advantage is rating (4.6 vs 4.3). On price, review sentiment, ratings volume and ads there is nothing between them.

Both are free to download. iEngineer sells 1 one-off in-app purchase and Engineering Unit Converter sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

iEngineer holds the better App Store score, 4.6 against 4.3. Both are backed by a comparable volume of ratings — 199 and 86 respectively. Written reviews point the same way: 86% of iEngineer's written reviews are positive against 82% of Engineering Unit Converter's.

iEngineer ships an update every 5 months, Engineering Unit Converter monthly. The most recent releases landed on October 26, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | iEngineer | Engineering Unit Converter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (199 ratings)](https://appshunter.io/ios/app/iengineer/id369825047/reviews)** | [4.3 (86 ratings)](https://appshunter.io/ios/app/engineering-unit-converter/id468517228/reviews) |
| Number of ratings | **199** | 86 |
| Positive reviews | **85.5% of reviews** | 82.4% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 12 MB | 6 MB |
| Requires iOS | 26.0 | **11.2** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | +4 |
| Developer | [Perfectly Simple Apps LLC](https://appshunter.io/developer/357604157) | [Vector 254 LLC](https://appshunter.io/developer/821141755) |

## 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 Unit Converter

[App page](https://appshunter.io/ios/app/engineering-unit-converter/id468517228)

This app offers a powerful and user-friendly way to convert units and currencies. It includes a built-in calculator, mass/mole fraction converter, thermocouple module, and physical constants database. Customize your display and input mathematical expressions for complex conversions.

**Highlights:** Unit conversion, Currency conversion, Built-in calculator, Mass/Mole Fraction Converter, Physical constants database, Customizable display, Mathematical expression input

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock App | $0.99 | one-time |


## Frequently asked questions

### Is iEngineer free?

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

### Is Engineering Unit Converter free?

Engineering Unit Converter is free to download, with in-app purchases available.

### Which has better reviews, iEngineer or Engineering Unit Converter?

iEngineer is rated higher. iEngineer averages 4.6 out of 5 from 199 ratings, while Engineering Unit Converter averages 4.3 from 86 ratings.

### Do iEngineer or Engineering Unit Converter have ads?

Neither iEngineer nor Engineering Unit Converter shows ads.

### Which is updated more often, iEngineer or Engineering Unit Converter?

iEngineer ships an update every 5 months, and Engineering Unit Converter monthly. Most recently, iEngineer was updated on October 26, 2026 and Engineering Unit Converter 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.*