# UnitConverter byNSDev vs ヒトメモネタ帳

The clearest difference is in-app purchases: UnitConverter byNSDev at none against ヒトメモネタ帳's 3. UnitConverter byNSDev also leads on ads (none vs shown). ヒトメモネタ帳's advantage is update cadence (monthly vs every 5 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. ヒトメモネタ帳 sells 3 in-app purchases, starting at $1.99 per month. UnitConverter byNSDev asks for nothing beyond the download.

UnitConverter byNSDev ships an update every 5 months, ヒトメモネタ帳 monthly. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | UnitConverter byNSDev | ヒトメモネタ帳 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 20.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | Free | — |
| Size | 4 MB | 96 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [NIHON SYSTEM DEVELOPER CORPORATION](https://appshunter.io/developer/1198103734) | [mizuki tatewaka](https://appshunter.io/developer/1831580099) |

## 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


### ヒトメモネタ帳

[App page](https://appshunter.io/ios/app/talkflow/id6772956621)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアムプラン(月額) | $1.99 | per month |
| プレミアムプラン(年額) | $14.99 | per year |
| プレミアムプラン(買い切り) | $19.99 | one-time |


## Frequently asked questions

### Is UnitConverter byNSDev free?

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

### Is ヒトメモネタ帳 free?

ヒトメモネタ帳 is free to download, with in-app purchases available.

### Do UnitConverter byNSDev or ヒトメモネタ帳 have ads?

ヒトメモネタ帳 shows ads; UnitConverter byNSDev does not.

### Which is updated more often, UnitConverter byNSDev or ヒトメモネタ帳?

UnitConverter byNSDev ships an update every 5 months, and ヒトメモネタ帳 monthly. Most recently, UnitConverter byNSDev was updated on November 2, 2026 and ヒトメモネタ帳 on October 31, 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.*