# 環海·東岸 vs Sky Tower

The clearest difference is iOS requirement: 環海·東岸 at 13.0 against Sky Tower's 15.0. 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.

環海·東岸 ships an update every 5 months, Sky Tower every 4 months. The most recent releases landed on November 6, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | 環海·東岸 | Sky Tower |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 4 months** |
| Size | 52 MB | 135 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [CardApp Limited](https://appshunter.io/developer/539151439) | [e-Smart System](https://appshunter.io/developer/1382513704) |

## What reviewers say

### 環海·東岸

[App page](https://appshunter.io/ios/app/id1410303182)

**In-app purchases:** none


### Sky Tower

[App page](https://appshunter.io/ios/app/sky-tower/id1618208270)

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

**In-app purchases:** none


## Frequently asked questions

### Is 環海·東岸 free?

環海·東岸 is free to download, with no in-app purchases.

### Is Sky Tower free?

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

### Do 環海·東岸 or Sky Tower have ads?

Neither 環海·東岸 nor Sky Tower shows ads.

### Which is updated more often, 環海·東岸 or Sky Tower?

環海·東岸 ships an update every 5 months, and Sky Tower every 4 months. Most recently, 環海·東岸 was updated on November 6, 2026 and Sky Tower on November 7, 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.*