海天気.jp vs Tide & Sky
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。
Tide & Sky
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Tide & Sky draws tides, sun, moon, weather and waves on a single timeline. Swipe and time moves: the sky changes colour, the sun and moon travel their arcs, and the water rises and falls. WHAT YOU SEE • The tide curve, with the times and levels of high and low tide • Sunrise, sunset, moonrise, moonset and the lit fraction of the moon • Daylight length and how much it changed since yesterday • Weather from Apple WeatherKit: temperature, rain chance, wind and pressure • Wave height, period and direction for stations in Japan • Stars, clouds and rain over the sky • Ten days forward and back PLACES • 2,522 tide stations: 229 in Japan (Japan Meteorological Agency) and 2,293 worldwide • Save the spots you visit and switch between them with one tap • Find a spot by name, by prefecture, or on the map • Every spot is shown in its own local time EVERYWHERE • Home Screen and Lock Screen widgets • Apple Watch app and complications • Share today's conditions as an image PREMIUM (monthly or yearly) • No ads • Alerts before or after high tide, low tide, sunrise, sunset, moonrise and moonset • A daily summary of tides, sun and moon, with weather, wind and waves when a forecast is available • Choose what the main screen shows, its time span, and a fixed 24-hour view • Choose what widgets show and the hours they cover Everything else is free, including every station, the widgets, the Apple Watch app and share cards. Tide levels are astronomical predictions from the moon and the sun. They do not include changes caused by air pressure or wind, and must not be used for navigation. Always check official sources. Terms of Use (Apple standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: 海天気.jp at none against Tide & Sky's 2. 海天気.jp also leads on iOS requirement (15.6 vs 18.0). Tide & Sky's advantage is update cadence (every 2 days vs every 4 months). On price, ads and device support 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. Tide & Sky sells 2 in-app purchases, starting at $1.99 per month. 海天気.jp asks for nothing beyond the download.
海天気.jp ships an update every 4 months, Tide & Sky every 2 days. The most recent releases landed on October 19, 2026 and October 5, 2026 respectively.
| Parameter | 海天気.jp | Tide & Sky |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 85.0% of reviews | — |
| Update frequency | Every 4 months | Every 2 days — better |
| Ads | Yes | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 15.6 — better | 18.0 |
| Further details — not scored | ||
| Size | 37 MB | 27 MB |
| Age rating | 4+ | 4+ |
| Developer | Risesystem, inc. | AO Inc. |
In-app purchases
海天気.jp
No in-app purchases
Tide & Sky
- Tide & Sky Premium Monthly$1.991 Month
- Tide & Sky Premium Yearly$14.991 Year









