# tenki.jp 登山天気 日本気象協会公式 山の天気予報 vs 海天気.jp

The clearest difference is review sentiment: 海天気.jp at 85% against tenki.jp 登山天気 日本気象協会公式 山の天気予報's 35%. 海天気.jp also leads on in-app purchases (none vs 3) and device support (3 vs 1). tenki.jp 登山天気 日本気象協会公式 山の天気予報's advantage is ads (none vs shown) and update cadence (every 2 weeks vs every 4 months). On price there is nothing between them.

Both are free to download. tenki.jp 登山天気 日本気象協会公式 山の天気予報 sells 3 in-app purchases, starting at $1.99 per month. 海天気.jp asks for nothing beyond the download.

tenki.jp 登山天気 日本気象協会公式 山の天気予報 ships an update every 2 weeks, 海天気.jp every 4 months. The most recent releases landed on September 23, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | tenki.jp 登山天気 日本気象協会公式 山の天気予報 | 海天気.jp |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.3 (3 ratings)](https://appshunter.io/ios/app/tenkijp/id1144845642/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 35.2% of reviews | **85.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Every 4 months |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 73 MB | 37 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [一般財団法人 日本気象協会](https://appshunter.io/developer/433865749) | [Risesystem, inc.](https://appshunter.io/developer/427437064) |

## What reviewers say

### tenki.jp 登山天気 日本気象協会公式 山の天気予報

[App page](https://appshunter.io/ios/app/tenkijp/id1144845642)

Get detailed, altitude-specific weather forecasts for mountains across Japan. Plan your hikes with confidence using precise temperature, precipitation, and wind predictions. Stay safe with real-time condition updates and expert-監修 meteorological data.

**Highlights:** Altitude-specific mountain weather forecasts, 14-day weather outlook (premium), Hourly weather updates (premium), Seasonal features like snow maps, Mountain condition summaries, Recommended clothing index, Upper-air weather charts

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 定期購読 | $1.99 | per month |
| 定期購読 | $3.99 | per month |
| 定期購読 | $34.99 | per year |


### 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 tenki.jp 登山天気 日本気象協会公式 山の天気予報 free?

tenki.jp 登山天気 日本気象協会公式 山の天気予報 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 tenki.jp 登山天気 日本気象協会公式 山の天気予報 or 海天気.jp have ads?

海天気.jp shows ads; tenki.jp 登山天気 日本気象協会公式 山の天気予報 does not.

### Which is updated more often, tenki.jp 登山天気 日本気象協会公式 山の天気予報 or 海天気.jp?

tenki.jp 登山天気 日本気象協会公式 山の天気予報 ships an update every 2 weeks, and 海天気.jp every 4 months. Most recently, tenki.jp 登山天気 日本気象協会公式 山の天気予報 was updated on September 23, 2026 and 海天気.jp on September 10, 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.*