# UnitConverter byNSDev vs Unit Converter All Categories

The clearest difference is in-app purchases: UnitConverter byNSDev at none against Unit Converter All Categories's 3. Unit Converter All Categories's advantage is update cadence (every 5 weeks vs every 5 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Unit Converter All Categories sells 3 in-app purchases, starting at $0.99 per month. UnitConverter byNSDev asks for nothing beyond the download.

UnitConverter byNSDev ships an update every 5 months, Unit Converter All Categories every 5 weeks. The most recent releases landed on October 21, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | UnitConverter byNSDev | Unit Converter All Categories |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 20.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 5 weeks** |
| Monetization | Free | — |
| Size | 4 MB | 12 MB |
| Requires iOS | **15.6** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [NIHON SYSTEM DEVELOPER CORPORATION](https://appshunter.io/developer/1198103734) | [Vladislav Zhirnov](https://appshunter.io/developer/1476188065) |

## What reviewers say

### 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


### Unit Converter All Categories

[App page](https://appshunter.io/ios/app/unit-converter-all-categories/id6747321259)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full version / monthly | $0.99 | per month |
| Full version / year | $2.99 | per year |
| Remove ADS | $4.99 | one-time |


## Frequently asked questions

### Is UnitConverter byNSDev free?

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

### Is Unit Converter All Categories free?

Unit Converter All Categories is free to download, with in-app purchases available.

### Do UnitConverter byNSDev or Unit Converter All Categories have ads?

Neither UnitConverter byNSDev nor Unit Converter All Categories shows ads.

### Which is updated more often, UnitConverter byNSDev or Unit Converter All Categories?

UnitConverter byNSDev ships an update every 5 months, and Unit Converter All Categories every 5 weeks. Most recently, UnitConverter byNSDev was updated on October 21, 2026 and Unit Converter All Categories on October 30, 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.*