# Kata Calc vs 東海堂 公式アプリ

The clearest difference is update cadence: 東海堂 公式アプリ at every 3 months against Kata Calc's every 7 months. Kata Calc's advantage is iOS requirement (9.3 vs 16.1.1). On price, ads, in-app purchases and device support there is nothing between them.

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

Kata Calc ships an update every 7 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 | Kata Calc | 東海堂 公式アプリ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 months** |
| Size | 2 MB | 24 MB |
| Requires iOS | **9.3** | 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

### Kata Calc

[App page](https://appshunter.io/ios/app/kata-calc/id478571273)

**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 Kata Calc free?

Kata Calc 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 Kata Calc or 東海堂 公式アプリ have ads?

Neither Kata Calc nor 東海堂 公式アプリ shows ads.

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

Kata Calc ships an update every 7 months, and 東海堂 公式アプリ every 3 months. Most recently, Kata Calc 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.*