# スカイツリーAi vs OshiroCho ~Castle Diary~

The clearest difference is ads: OshiroCho ~Castle Diary~ at none against スカイツリーAi's shown. OshiroCho ~Castle Diary~ also leads on update cadence (monthly vs every 9 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.

スカイツリーAi ships an update every 9 months, OshiroCho ~Castle Diary~ monthly. The most recent releases landed on October 12, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | スカイツリーAi | OshiroCho ~Castle Diary~ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 9 months | **Monthly** |
| Size | 12 MB | 96 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SmartUF Co., Ltd.](https://appshunter.io/developer/516335313) | [takeru urushihara](https://appshunter.io/developer/1865114300) |

## What reviewers say

### スカイツリーAi

[App page](https://appshunter.io/ios/app/ai-map/id535545716)

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

**In-app purchases:** none


### OshiroCho ~Castle Diary~

[App page](https://appshunter.io/ios/app/oshirocho-castle-diary/id6767598604)

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

**In-app purchases:** none


## Frequently asked questions

### Is スカイツリーAi free?

スカイツリーAi is free to download, with no in-app purchases.

### Is OshiroCho ~Castle Diary~ free?

OshiroCho ~Castle Diary~ is free to download, with no in-app purchases.

### Do スカイツリーAi or OshiroCho ~Castle Diary~ have ads?

スカイツリーAi shows ads; OshiroCho ~Castle Diary~ does not.

### Which is updated more often, スカイツリーAi or OshiroCho ~Castle Diary~?

スカイツリーAi ships an update every 9 months, and OshiroCho ~Castle Diary~ monthly. Most recently, スカイツリーAi was updated on October 12, 2026 and OshiroCho ~Castle Diary~ on October 19, 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.*