# Japan's 100 Great Castles vs 洞窟・鍾乳洞MAP

The clearest difference is ads: Japan's 100 Great Castles at none against 洞窟・鍾乳洞MAP's shown. Japan's 100 Great Castles also leads on iOS requirement (15.0 vs 26.5). 洞窟・鍾乳洞MAP's advantage is update cadence (every 4 days vs every 11 days). On price, 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.

Japan's 100 Great Castles ships an update every 11 days, 洞窟・鍾乳洞MAP every 4 days. The most recent releases landed on November 4, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Japan's 100 Great Castles | 洞窟・鍾乳洞MAP |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 11 days | **Every 4 days** |
| Size | 74 MB | 7 MB |
| Requires iOS | **15.0** | 26.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Takuya Tsukagoshi](https://appshunter.io/developer/1765890842) | [Adilkei Tsuchiya](https://appshunter.io/developer/6775721389) |

## What reviewers say

### Japan's 100 Great Castles

[App page](https://appshunter.io/ios/app/japans-100-great-castles/id6670339907)

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

**In-app purchases:** none


### 洞窟・鍾乳洞MAP

[App page](https://appshunter.io/ios/app/map/id6780389204)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Japan's 100 Great Castles free?

Japan's 100 Great Castles is free to download, with no in-app purchases.

### Is 洞窟・鍾乳洞MAP free?

洞窟・鍾乳洞MAP is free to download, with no in-app purchases.

### Do Japan's 100 Great Castles or 洞窟・鍾乳洞MAP have ads?

洞窟・鍾乳洞MAP shows ads; Japan's 100 Great Castles does not.

### Which is updated more often, Japan's 100 Great Castles or 洞窟・鍾乳洞MAP?

Japan's 100 Great Castles ships an update every 11 days, and 洞窟・鍾乳洞MAP every 4 days. Most recently, Japan's 100 Great Castles was updated on November 4, 2026 and 洞窟・鍾乳洞MAP on October 25, 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.*