# iEngineer vs Hilti Volume Calculator

The clearest difference is review sentiment: iEngineer at 86% against Hilti Volume Calculator's 40%. iEngineer also leads on rating (4.6 vs 3.7) and ratings volume (200 vs 13). Hilti Volume Calculator's advantage is in-app purchases (none vs 1) and update cadence (every 3 months vs every 5 months). On price, ads and device support there is nothing between them.

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

iEngineer holds the better App Store score, 4.6 against 3.7. That said, the two scores are not equally well evidenced: iEngineer has 200 ratings behind it against 13, so its average is the more settled of the two. Written reviews point the same way: 86% of iEngineer's written reviews are positive against 40% of Hilti Volume Calculator's.

iEngineer ships an update every 5 months, Hilti Volume Calculator every 3 months. Both last shipped on October 29, 2026.

## The numbers

| Metric | iEngineer | Hilti Volume Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (200 ratings)](https://appshunter.io/ios/app/iengineer/id369825047/reviews)** | [3.7 (13 ratings)](https://appshunter.io/ios/app/hilti-volume-calculator/id722816215/reviews) |
| Number of ratings | **200** | 13 |
| Positive reviews | **85.5% of reviews** | 40.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 12 MB | 72 MB |
| Requires iOS | 26.0 | **14.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Perfectly Simple Apps LLC](https://appshunter.io/developer/357604157) | [Hilti AG](https://appshunter.io/developer/390143159) |

## 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


### Hilti Volume Calculator

[App page](https://appshunter.io/ios/app/hilti-volume-calculator/id722816215)

Estimate the quantity of chemical anchor foil packs needed for your jobsite. Customize calculations to match your specific working conditions and ensure you have the right materials on hand.

**Highlights:** Estimate chemical anchor foil pack quantities, Jobsite material planning, Customizable calculation results, Adapt to working conditions

**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 Hilti Volume Calculator free?

Hilti Volume Calculator is free to download, with no in-app purchases.

### Which has better reviews, iEngineer or Hilti Volume Calculator?

iEngineer is rated higher. iEngineer averages 4.6 out of 5 from 200 ratings, while Hilti Volume Calculator averages 3.7 from 13 ratings.

### Do iEngineer or Hilti Volume Calculator have ads?

Neither iEngineer nor Hilti Volume Calculator shows ads.

### Which is updated more often, iEngineer or Hilti Volume Calculator?

iEngineer ships an update every 5 months, and Hilti Volume Calculator every 3 months. Most recently, iEngineer was updated on October 29, 2026 and Hilti Volume Calculator on October 29, 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.*