# 突然の死 vs UnitConverter byNSDev

The clearest difference is review sentiment: 突然の死 at 86% against UnitConverter byNSDev's 20%. 突然の死 also leads on iOS requirement (11.4 vs 15.6). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Both ship on a similar rhythm, roughly every 5 months. The most recent releases landed on October 6, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | 突然の死 | UnitConverter byNSDev |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **85.7% of reviews** | 20.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | Every 5 months |
| Monetization | — | Free |
| Size | 4 MB | 4 MB |
| Requires iOS | **11.4** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Tadahisa Motooka](https://appshunter.io/developer/394580132) | [NIHON SYSTEM DEVELOPER CORPORATION](https://appshunter.io/developer/1198103734) |

## What reviewers say

### 突然の死

[App page](https://appshunter.io/ios/app/id737765108)

**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 突然の死 free?

突然の死 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 突然の死 or UnitConverter byNSDev have ads?

Neither 突然の死 nor UnitConverter byNSDev shows ads.

### Which is updated more often, 突然の死 or UnitConverter byNSDev?

突然の死 ships an update every 5 months, and UnitConverter byNSDev every 5 months. Most recently, 突然の死 was updated on October 6, 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.*