# 海のカレンダー vs 1000digit Calc

The clearest difference is ads: 1000digit Calc at none against 海のカレンダー's shown. 1000digit Calc also leads on update cadence (weekly vs every 4 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

海のカレンダー ships an update every 4 months, 1000digit Calc weekly. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 海のカレンダー | 1000digit Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/1000digit-calc/id6463856899/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Weekly** |
| Size | 27 MB | 5 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Akira Yamamoto](https://appshunter.io/developer/1401669011) | [Yukihiro Shioya](https://appshunter.io/developer/1565306192) |

## What reviewers say

### 海のカレンダー

[App page](https://appshunter.io/ios/app/id1502904539)

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

**In-app purchases:** none


### 1000digit Calc

[App page](https://appshunter.io/ios/app/1000digit-calc/id6463856899)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 海のカレンダー free?

海のカレンダー is free to download, with no in-app purchases.

### Is 1000digit Calc free?

1000digit Calc is free to download, with no in-app purchases.

### Do 海のカレンダー or 1000digit Calc have ads?

海のカレンダー shows ads; 1000digit Calc does not.

### Which is updated more often, 海のカレンダー or 1000digit Calc?

海のカレンダー ships an update every 4 months, and 1000digit Calc weekly. Most recently, 海のカレンダー was updated on October 25, 2026 and 1000digit Calc on October 24, 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.*