# Unit Converter For Engineers vs VTrackLink

The clearest difference is in-app purchases: VTrackLink at none against Unit Converter For Engineers's 2. VTrackLink also leads on iOS requirement (13.0 vs 16.2). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Unit Converter For Engineers sells 2 in-app purchases, starting at $9.99 per year. VTrackLink asks for nothing beyond the download.

Unit Converter For Engineers ships an update every 9 days, VTrackLink fortnightly. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Unit Converter For Engineers | VTrackLink |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/unit-converter-for-engineers/id6752224915/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 9 days** | Fortnightly |
| Monetization | Freemium | — |
| Size | 5 MB | 57 MB |
| Requires iOS | 16.2 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Amanuel Abebaw](https://appshunter.io/developer/1766393564) | [LAONPEOPLE INC.](https://appshunter.io/developer/1643057004) |

## What reviewers say

### Unit Converter For Engineers

[App page](https://appshunter.io/ios/app/unit-converter-for-engineers/id6752224915)

This app provides a comprehensive unit conversion tool specifically designed for engineers, offering specialized units not found in standard converters. It features offline functionality, fast search, and a clean interface, replacing the need for multiple reference materials.

**Highlights:** Specialized engineering units, Offline functionality, Fast search and instant conversion, Fraction input mode, Ad-free interface, Scientific notation support

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Annual Subscription | $9.99 | per year |
| Lifetime Access | $29.99 | one-time |


### VTrackLink

[App page](https://appshunter.io/ios/app/vtracklink/id6760283292)

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

**In-app purchases:** none


## Frequently asked questions

### Is Unit Converter For Engineers free?

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

### Is VTrackLink free?

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

### Do Unit Converter For Engineers or VTrackLink have ads?

Neither Unit Converter For Engineers nor VTrackLink shows ads.

### Which is updated more often, Unit Converter For Engineers or VTrackLink?

Unit Converter For Engineers ships an update every 9 days, and VTrackLink fortnightly. Most recently, Unit Converter For Engineers was updated on October 30, 2026 and VTrackLink on October 25, 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.*