iEngineer vs Hilti Volume Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iEngineer
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.
- 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
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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
Hilti Volume Calculator
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.
- Estimate chemical anchor foil pack quantities
- Jobsite material planning
- Customizable calculation results
- Adapt to working conditions
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Hilti Volume Calculators allows professionals to easily estimate the required quantity of chemical anchors foil packs. This will help you on your jobsite to have always what you need at hand! Customization of the results allows you to adapt the calculation to your working conditions.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | iEngineer | Hilti Volume Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (200 ratings) — better | 3.7 (13 ratings) |
| Positive reviews | 85.5% of reviews — better | 40.0% of reviews |
| Number of ratings | 200 — better | 13 |
| Update frequency | Every 5 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 26.0 | 14.0 — better |
| Further details — not scored | ||
| Size | 12 MB | 72 MB |
| Age rating | 4+ | 4+ |
| Developer | Perfectly Simple Apps LLC | Hilti AG |
Customer experience
iEngineer
Hilti Volume Calculator
Bugs and requests
iEngineer
Reported bugs
2 issues- Metric portion not working for some users
- Camera access request for no apparent reason
Requested features
4 requests- Add tap drill chart
- Include clearance hole fits
- Improve UI for larger displays
- Add French language support
Hilti Volume Calculator
Not enough reviews yet to summarise bugs or requests.
In-app purchases
iEngineer
- Metric Screws$1.99
Hilti Volume Calculator
No in-app purchases
Questions
Is iEngineer free?
Is Hilti Volume Calculator free?
Which has better reviews, iEngineer or Hilti Volume Calculator?
Do iEngineer or Hilti Volume Calculator have ads?
Which is updated more often, iEngineer or Hilti Volume Calculator?
Other comparisons
