マリンウェザー海快晴 <海専門の天気と気象予報アプリ>

240K installs
Ratings not yet available
61.7K monthly active users
$<10K monthly revenue est.
IAP 100% · Ad 0%
Install Trends
Weekly +41.9K
Trending
Monthly +83.7K
Trending

マリンウェザー海快晴 <海専門の天気と気象予報アプリ> Summary

マリンウェザー海快晴 <海専門の天気と気象予報アプリ> is a with in-app purchases Android app in Weather by Surflegend inc.. Released in Jan 2011 (15 years ago). It has about 240K+ installs Based on AppGoblin estimates, it reaches roughly 61.7K monthly active users and generates around $<10K monthly revenue (100% IAP / 0% ads). Store metadata: updated Apr 16, 2026, version 89.

Recent activity: 41.9K installs this week (83.7K over 4 weeks) showing exceptional growth View trends →

Data tracking: SDKs and third-party integrations were last analyzed on Apr 26, 2026. The app's network data flows (API traffic to/from the app and its SDKs) were last crawled on Mar 19, 2026.

Store info: Last updated on Google Play on Apr 16, 2026 (version 89).


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App Description

Umikaisei is a weather forecast app specializing in marine weather. It provides weather, wind and wave forecasts, tides, seawater temperature, moon phase, and more for approximately 18,000 coastal locations across Japan.

[One-Month Free Trial Available] Features hourly real-time wind forecasts. Provides specialized marine weather information for enthusiasts of various marine sports and leisure activities, including fishing, diving, sailing, sea kayaking, and boating.

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■One-Month Free Trial
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Anyone registering for the Basic Course for the first time can use it for free for a certain period. (Those who have previously subscribed to the Basic Course and have never used the free trial can also use the free trial.)

The free trial period is one month, including the initial purchase start date. If the member does not cancel their purchase at least 24 hours before the end of the purchase period, the next renewal fee will be automatically charged.

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■ Overview of Main Features
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The Kaikaisei app is a specialized marine weather information service that provides pinpoint real-time conditions and forecasts for over 18,000 coastal areas throughout Japan, as well as numerical forecasts and image data for wind and waves, tidal information, and a lunar calendar.
It features "Real-time Wind Forecast," providing detailed wind forecasts that were previously difficult to predict, updated hourly. Furthermore, for wind and wave forecasts, in addition to proprietary forecast data developed in collaboration with Kyoto University, forecast data from the Japan Meteorological Agency is also included, allowing users to compare the trends of both forecasts. This makes it easier to make decisions when departing for port, fishing trips, and other marine leisure activities. Additionally, the icon designs have been updated, and the weather information animations and their playback content have been made more user-friendly and easier to understand.
You can find detailed weather information for your desired location with just a simple search. With map search, you can easily find the weather for the location you want to know about by simply zooming in and out with your fingertips.

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■ Free Features
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• Nationwide sea weather overview (updated daily), independently published by Kaikaisei
• Weather forecasts and overviews published by the Japan Meteorological Agency
• Current and forecast weather maps and typhoon information published by the Japan Meteorological Agency
• Precipitation and thunderstorm forecasts, AMeDAS (provided in graph and table formats)
• Tide tables and lunar calendar

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■ Paid Features
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• Real-time wind forecasts updated hourly (every 30 minutes, up to 10 hours ahead)
• Wind direction, wind speed, wave height, wave direction, swell period, tide level, etc. for over 18,000 coastal locations throughout Japan Pinpoint forecast (hourly, up to 72 hours ahead)
・Offshore weekly forecast (hourly, up to 168 hours ahead)
・Pinpoint forecast search function from your current location using GPS
・Proprietary wind and wave forecast using WRF and SWAN models
・Two forecasts: proprietary wind and wave forecast and Japan Meteorological Agency forecast side-by-side
・My Page function to register frequently used points and weather forecasting tools
・Push notification function that alerts you when wind and wave sizes reach a certain level for frequently used points

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■ About Paid Purchase
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・Purchase Price: 480 yen per month (tax included)
*Price may change.
・Available for one month from the purchase date.
・Charged to your iTunes account and automatically renewed every month (automatic renewal purchase).

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■ About Automatic Renewal Purchases
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* Unless you cancel automatic renewal at least 24 hours before the renewal date of your purchase agreement, your purchase agreement will be automatically renewed, and you will be charged for the next month's purchase fee.
* How to stop automatic renewal purchases (from Android devices)
1. Open the Google Play app
2. Tap the profile icon in the upper right corner
3. Tap Payments & subscriptions > Subscriptions
4. Tap Cancel Subscription

* You can check the next automatic renewal date and repurchase by following the steps up to 3 above.
* You cannot stop automatic renewal from within the Kaikaisei app.
* Please complete the procedure from the Play Store.

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■Regarding Suspension/Cancellation of Purchase
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・You can suspend your purchase during the purchase period.

・Even if you suspend your purchase, you can still use the service for one month from the purchase date.

・We cannot provide a prorated refund for the number of days from the date of suspension to the end of the purchase period.

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・Terms of Service URL
https://www.umikaisei.jp/help/android/4679

・Privacy Policy URL
https://www.umikaisei.jp/help/android/4683

Provided by: Surf Legend Co., Ltd. (Weather Forecasting Business License No. 70)