# WoodenHead vs UnitConverter byNSDev

The clearest difference is update cadence: WoodenHead at every 2 months against UnitConverter byNSDev's every 5 months. WoodenHead also leads on iOS requirement (13.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

WoodenHead ships an update every 2 months, UnitConverter byNSDev every 5 months. The most recent releases landed on October 8, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | WoodenHead | UnitConverter byNSDev |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 20.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Monetization | — | Free |
| Size | 388 MB | 4 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tetsuya Shiraishi](https://appshunter.io/developer/358346416) | [NIHON SYSTEM DEVELOPER CORPORATION](https://appshunter.io/developer/1198103734) |

## What reviewers say

### WoodenHead

[App page](https://appshunter.io/ios/app/woodenhead/id1109324012)

**Features:** macOS Compatibility

**In-app purchases:** none


### UnitConverter byNSDev

[App page](https://appshunter.io/ios/app/unitconverter-bynsdev/id1229121492)

This tool converts between 26 different types of units, displaying conversion rates and allowing you to specify decimal places. It supports a vast array of units across categories like length, mass, volume, and more.

**Highlights:** Converts 26 types of units, Displays conversion rates, Customizable decimal places, Supports numerous units in various categories, User-submitted unit requests

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

**In-app purchases:** none


## Frequently asked questions

### Is WoodenHead free?

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

### Is UnitConverter byNSDev free?

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

### Do WoodenHead or UnitConverter byNSDev have ads?

Neither WoodenHead nor UnitConverter byNSDev shows ads.

### Which is updated more often, WoodenHead or UnitConverter byNSDev?

WoodenHead ships an update every 2 months, and UnitConverter byNSDev every 5 months. Most recently, WoodenHead was updated on October 8, 2026 and UnitConverter byNSDev on October 4, 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.*