# Circuit Navigator vs Unit Converter For Engineers

The clearest difference is in-app purchases: Circuit Navigator at none against Unit Converter For Engineers's 2. Circuit Navigator also leads on iOS requirement (13.0 vs 16.2). Unit Converter For Engineers's advantage is update cadence (every 9 days vs every 5 months). On price, 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. Circuit Navigator asks for nothing beyond the download.

Circuit Navigator ships an update every 5 months, Unit Converter For Engineers every 9 days. The most recent releases landed on October 9, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Circuit Navigator | Unit Converter For Engineers |
| --- | --- | --- |
| 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 | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 9 days** |
| Monetization | — | Freemium |
| Size | 24 MB | 5 MB |
| Requires iOS | **13.0** | 16.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Persistent Engineering LLC](https://appshunter.io/developer/1702291478) | [Amanuel Abebaw](https://appshunter.io/developer/1766393564) |

## What reviewers say

### Circuit Navigator

[App page](https://appshunter.io/ios/app/circuit-navigator/id6461048331)

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Circuit Navigator free?

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

### Is Unit Converter For Engineers free?

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

### Do Circuit Navigator or Unit Converter For Engineers have ads?

Neither Circuit Navigator nor Unit Converter For Engineers shows ads.

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

Circuit Navigator ships an update every 5 months, and Unit Converter For Engineers every 9 days. Most recently, Circuit Navigator was updated on October 9, 2026 and Unit Converter For Engineers on October 18, 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.*