# 海快晴 海専門の気象情報サービス vs 海天気.jp

The clearest difference is review sentiment: 海天気.jp at 85% against 海快晴 海専門の気象情報サービス's 27%. 海天気.jp also leads on in-app purchases (none vs 1). 海快晴 海専門の気象情報サービス's advantage is ads (none vs shown) and update cadence (monthly vs every 4 months). On price and device support there is nothing between them.

Both are free to download. 海快晴 海専門の気象情報サービス sells 1 in-app purchase, starting at $3.99 per month. 海天気.jp asks for nothing beyond the download.

海快晴 海専門の気象情報サービス ships an update monthly, 海天気.jp every 4 months. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | 海快晴 海専門の気象情報サービス | 海天気.jp |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 27.5% of reviews | **85.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Monthly** | Every 4 months |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 34 MB | 37 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [株式会社サーフレジェンド](https://appshunter.io/developer/781382725) | [Risesystem, inc.](https://appshunter.io/developer/427437064) |

## What reviewers say

### 海快晴 海専門の気象情報サービス

[App page](https://appshunter.io/ios/app/id1064920309)

Provides detailed marine weather forecasts for various water sports and leisure activities. Offers real-time wind forecasts, wave predictions, and tide information for over 18,000 coastal locations.

**Highlights:** Real-time wind forecasts, Wave and tide predictions, 18,000+ coastal locations, Dual forecast comparison (proprietary & JMA), GPS-based location search, Push notifications for conditions

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 海快晴 有料登録コース | $3.99 | per month |


### 海天気.jp

[App page](https://appshunter.io/ios/app/jp/id1641843175)

Get detailed, hourly weather forecasts for over 8,000 marine spots, including wind, temperature, and wave height. Visualize precipitation with clear icons and access 14-day outlooks for planning. Also provides city-level forecasts and rain cloud movement.

**Highlights:** Hourly forecasts for 8,000+ marine spots, Up to 84-hour pinpoint weather predictions, 14-day weather outlooks, Rain cloud and lightning movement visualization, Tide graphs and sea temperature maps, City-level weather forecasts, Favorite spot bookmarking

**In-app purchases:** none


## Frequently asked questions

### Is 海快晴 海専門の気象情報サービス free?

海快晴 海専門の気象情報サービス is free to download, with in-app purchases available.

### Is 海天気.jp free?

海天気.jp is free to download, with no in-app purchases.

### Do 海快晴 海専門の気象情報サービス or 海天気.jp have ads?

海天気.jp shows ads; 海快晴 海専門の気象情報サービス does not.

### Which is updated more often, 海快晴 海専門の気象情報サービス or 海天気.jp?

海快晴 海専門の気象情報サービス ships an update monthly, and 海天気.jp every 4 months. Most recently, 海快晴 海専門の気象情報サービス was updated on October 29, 2026 and 海天気.jp on October 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.*