# iEngineer vs LangBelta

The clearest difference is in-app purchases: LangBelta at none against iEngineer's 1. LangBelta also leads on update cadence (every 3 weeks vs every 5 months) and iOS requirement (15.0 vs 26.0). On price, ads and device support there is nothing between them.

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

iEngineer ships an update every 5 months, LangBelta every 3 weeks. The most recent releases landed on October 29, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | iEngineer | LangBelta |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (200 ratings)](https://appshunter.io/ios/app/iengineer/id369825047/reviews)** | — |
| Number of ratings | **200** | — |
| Positive reviews | 85.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 12 MB | 18 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Perfectly Simple Apps LLC](https://appshunter.io/developer/357604157) | [Erik Drysen](https://appshunter.io/developer/6797124647) |

## 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


### LangBelta

[App page](https://appshunter.io/ios/app/langbelta/id6797124645)

**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 LangBelta free?

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

### Do iEngineer or LangBelta have ads?

Neither iEngineer nor LangBelta shows ads.

### Which is updated more often, iEngineer or LangBelta?

iEngineer ships an update every 5 months, and LangBelta every 3 weeks. Most recently, iEngineer was updated on October 29, 2026 and LangBelta on October 21, 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.*