# K vs 東海堂 公式アプリ

The clearest difference is iOS requirement: K at 14.0 against 東海堂 公式アプリ's 16.1.1. 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.

K ships an update every 5 months, 東海堂 公式アプリ every 3 months. The most recent releases landed on October 3, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | K | 東海堂 公式アプリ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 months** |
| Size | 1 MB | 24 MB |
| Requires iOS | **14.0** | 16.1.1 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [okashige0319](https://appshunter.io/developer/478571276) | [TOKAIDO K.K.](https://appshunter.io/developer/1573868609) |

## What reviewers say

### K

[App page](https://appshunter.io/ios/app/k-kalc/id1557032391)

**Features:** macOS Compatibility

**In-app purchases:** none


### 東海堂 公式アプリ

[App page](https://appshunter.io/ios/app/id1573868607)

**In-app purchases:** none


## Frequently asked questions

### Is K free?

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

### Is 東海堂 公式アプリ free?

東海堂 公式アプリ is free to download, with no in-app purchases.

### Do K or 東海堂 公式アプリ have ads?

Neither K nor 東海堂 公式アプリ shows ads.

### Which is updated more often, K or 東海堂 公式アプリ?

K ships an update every 5 months, and 東海堂 公式アプリ every 3 months. Most recently, K was updated on October 3, 2026 and 東海堂 公式アプリ 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.*