# UnitConverter byNSDev vs PriceWise / 単価比べ

The clearest difference is in-app purchases: UnitConverter byNSDev at none against PriceWise / 単価比べ's 1. UnitConverter byNSDev also leads on ads (none vs shown) and iOS requirement (15.6 vs 17.6). PriceWise / 単価比べ's advantage is update cadence (every 2 weeks vs every 5 months). On price and device support there is nothing between them.

Both are free to download. PriceWise / 単価比べ sells 1 one-off in-app purchase. UnitConverter byNSDev asks for nothing beyond the download.

UnitConverter byNSDev ships an update every 5 months, PriceWise / 単価比べ every 2 weeks. The most recent releases landed on October 4, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | UnitConverter byNSDev | PriceWise / 単価比べ |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 20.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 4 MB | 5 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [NIHON SYSTEM DEVELOPER CORPORATION](https://appshunter.io/developer/1198103734) | [MASARU KATO](https://appshunter.io/developer/1883480774) |

## 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


### PriceWise / 単価比べ

[App page](https://appshunter.io/ios/app/pricewise/id6764689863)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is UnitConverter byNSDev free?

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

### Is PriceWise / 単価比べ free?

PriceWise / 単価比べ is free to download, with in-app purchases available.

### Do UnitConverter byNSDev or PriceWise / 単価比べ have ads?

PriceWise / 単価比べ shows ads; UnitConverter byNSDev does not.

### Which is updated more often, UnitConverter byNSDev or PriceWise / 単価比べ?

UnitConverter byNSDev ships an update every 5 months, and PriceWise / 単価比べ every 2 weeks. Most recently, UnitConverter byNSDev was updated on October 4, 2026 and PriceWise / 単価比べ on September 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.*