# UnitConverter byNSDev vs Unit Converter Currency Rate

The clearest difference is in-app purchases: UnitConverter byNSDev at none against Unit Converter Currency Rate's 4. UnitConverter byNSDev also leads on ads (none vs shown). Unit Converter Currency Rate's advantage is review sentiment (29% vs 20%). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Unit Converter Currency Rate sells 4 in-app purchases, starting at $4.99 per 7 days. UnitConverter byNSDev asks for nothing beyond the download.

UnitConverter byNSDev ships an update every 5 months, Unit Converter Currency Rate every 3 months. The most recent releases landed on September 17, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | UnitConverter byNSDev | Unit Converter Currency Rate |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (195 ratings)](https://appshunter.io/ios/app/unit-converter-currency-rate/id1557869688/reviews)** |
| Number of ratings | — | **195** |
| Positive reviews | 20.0% of reviews | **28.6% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Every 3 months** |
| Monetization | **Free** | Freemium |
| Size | 4 MB | 17 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) | [汇杭 钟](https://appshunter.io/developer/1481585840) |

## 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 Currency Rate

[App page](https://appshunter.io/ios/app/unit-converter-currency-rate/id1557869688)

This app provides instant conversions for over 40 unit categories and 30 global currencies. It offers live exchange rates and offline conversion capabilities, making it ideal for travel, study, and professional tasks. A built-in calculator aids in quick calculations before converting.

**Highlights:** 40+ unit categories, 30+ global currencies, Live exchange rates, Offline conversion, Built-in calculator, Unit size conversion

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $4.99 | per 7 days |
| Premium Monthly | $9.99 | per month |
| Premium Yearly | $29.99 | per year |
| LifeTime Premium | $49.99 | one-time |


## Frequently asked questions

### Is UnitConverter byNSDev free?

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

### Is Unit Converter Currency Rate free?

Unit Converter Currency Rate is free to download, with in-app purchases available.

### Do UnitConverter byNSDev or Unit Converter Currency Rate have ads?

Unit Converter Currency Rate shows ads; UnitConverter byNSDev does not.

### Which is updated more often, UnitConverter byNSDev or Unit Converter Currency Rate?

UnitConverter byNSDev ships an update every 5 months, and Unit Converter Currency Rate every 3 months. Most recently, UnitConverter byNSDev was updated on September 17, 2026 and Unit Converter Currency Rate on September 14, 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.*