海天気.jp vs Digital AMeDAS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
海天気.jp
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.
- 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
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全国8,000箇所以上のマリンスポットの、最大84時間先までのピンポイント天気、風、気温、波の高さの予報を1時間ごとの時系列で表示します。降水量は1mm未満までわかりやすい傘マークとともに表現しているので、どのくらいの雨が降りそうかがビジュアルで一目瞭然！ ■海スポットならではの情報が満載 沖合いの波高推移や潮汐データ（タイドグラフ）、海水温分布図、潮流のアニメーションなど、マリンアクティビティにマストな情報を網羅。 ■14日間天気予報 14日（２週間）先までの天気予報を、3時間毎の時系列で提供。マリンレジャー計画に役立つ天気の流れの把握に！ ■マリンスポット周辺の雨雲/雷の動き 雨雲の動きを過去、未来（6時間先）まで動画にてビジュアル再生。空の雲行きが怪しくなってきたら、すかさず雨雲/雷の動きをチェックしてください。 ----さらに便利な機能も！---- ■市町村ピンポイント天気予報 マリンスポットだけでなく、全国の市町村（市町村役場）単位での天気予報も、1時間毎の時系列で提供。 ～マリンレジャーシーン以外でも、買い物や通勤・通学などの日常生活でもご活用下さい～ ■マリンスポット、市町村の閲覧履歴 「閲覧履歴」から、最近閲覧したマリンスポットや市町村の履歴を一覧表示。よく見るページによりアクセスし易くなります。 ■お気に入りのマリンスポットをブックマーク「マイポイント」 あなたが良く行く複数のマリンスポットを一覧表示！ スピーディーに自分の行くマリンスポットの天気チェックを可能にする機能が「マイポイント」です。 ■現在地からルート検索 現在位置情報をアプリと連携し、地図アプリでの釣りスポットまでのルート検索可能。
Digital AMeDAS
Access and analyze meteorological data from a network of automated weather stations. This application helps users obtain detailed weather information for specific locations, aiding the Japan Meteorological Agency in understanding data utilization and improving services.
- Access AMeDAS meteorological data
- View spatially analyzed data
- Obtain data for specific locations
- User attribute registration
- Feedback and request submission
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About this app 【App Overview】 The Automated Meteorological Data Acquisition System (AMeDAS) is a collection of Automatic Weather Stations (AWSs) run by the Japan Meteorological Agency (JMA). The JMA is currently promoting its "Digital AMeDAS" initiative using the name AMeDAS. The Digital AMeDAS app enables users to obtain meteorological data for locations of interest from spatially analysed data. Through the operation of this app, JMA aims to understands the utilization status and needs of this information to improve its ease of use. 【Terms of Use】 In order to achieve the purpose of this app, we ask that you register your user attributes. Also, if you have any feedback about this app, please contact us via "Feedback and requests" 【Privacy Policy】 Your personal information will be protected under the following protection policy: （1）Your location and device identifiers might be collected when using. （2）You are required to register your age, gender, current area of residence, and purpose of use. （3）Your personal data will only be processed when necessary for operational purposes. It will not be used for any other purposes or provided to third parties.
Screenshots
Verdict
The clearest difference is review sentiment: 海天気.jp at 85% against Digital AMeDAS's 31%. Digital AMeDAS's advantage is ads (none vs shown) and update cadence (every 10 days vs every 4 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
海天気.jp ships an update every 4 months, Digital AMeDAS every 10 days. The most recent releases landed on September 10, 2026 and September 18, 2026 respectively.
| Parameter | 海天気.jp | Digital AMeDAS |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 85.0% of reviews — better | 30.8% of reviews |
| Update frequency | Every 4 months | Every 10 days — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 37 MB | 46 MB |
| Age rating | 4+ | 4+ |
| Developer | Risesystem, inc. | 気象工学研究所 |
Customer experience
海天気.jp
Digital AMeDAS
In-app purchases
海天気.jp
No in-app purchases
Digital AMeDAS
No in-app purchases
Questions
Is 海天気.jp free?
Is Digital AMeDAS free?
Do 海天気.jp or Digital AMeDAS have ads?
Which is updated more often, 海天気.jp or Digital AMeDAS?
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