潮位アラート

Contains ads
10+
Downloads
Content rating
Everyone
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About this app

[A must-see for anglers and surfers! Master the tides!] "Tide Alert" is an app that lets you easily and precisely check tide information (tide graphs) for ports and points across Japan.

It's more than just a tide chart. Its greatest feature is its **notification function**. It accurately notifies you of the desired tide timing (high tide/low tide) and sunrise/sunset times via push notifications. You'll never miss the best fishing or surfing time again.

Key Features

Easy-to-Read Tide Graph: The intuitive design lets you see the tide movements of the day at a glance.
Tide Alert Notification: Automatically receive notifications for high and low tide times. You'll never miss a moment, even if you're not looking at your smartphone.
Nearest Location Search: The GPS function instantly finds and displays the nearest observation point from your current location. Never get lost on a long trip.
Weather and Ocean Condition Map Integration: The popular "Windy" map is built into the app. Check wind direction, wave height, and cloud movement with just one tap.
Moon Phase/Tide Name Calendar: View tidal cycles, including spring and neap tides, on a calendar. Plan your weekend fishing trips and trips with ease.
Favorite Bookmarks: Register your favorite home spots and check them immediately after launching the app.
Recommended for:

Fishing: For those who want to avoid missing the best times before and after high tide, and want to know when the tide is low.
Surfing: For those who want to know the best tide times for good waves.
Clamming/Playing on the Rocks: For families who want to know the best times for low tide.
Boats/Marine Leisure: For those who want to check tide levels for safe navigation.
"Tide Alert" makes your marine life more convenient and comfortable. Download it now and head out to sea!

🗺️ Added bathymetric (bathymetric) display feature
・Displays the bathymetric topography of the entire country of Japan using bathymetric contours
・See water depth at a glance, perfect for finding fishing spots
・Automatically adjusts the level of detail based on the zoom level
🎛️ Map layer switching feature
・Toggles bathymetric contour display on/off
・Switches between standard map and satellite imagery
・Toggles the display of nautical chart layers (nautical aids)
・Optimized for smooth operation on low-spec devices
📍 Map feature improvements
・Added a scale bar to the map (for easier understanding of distance)
・Added location tracking mode
・Added fixed north (compass) mode
・More intuitive map navigation
⚡ Performance improvements
・Optimized bathymetric contour calculation
・Caching function for faster operation
・Disable bathymetric contours when needed for smoother operation
📚 Expanded tutorial
・Detailed explanation of how to use new features
・Added performance tips
Other minor improvements and bug fixes.
Updated on
Mar 14, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
Learn more about how developers declare collection

What’s new

- 等深線の大幅強化:
5m・10m・20m・30m・50m間隔の細かい等深線を表示。より広
い縮尺(5km)から確認できるようになりました。
- 沈没船の表示: 海上保安庁「海しる」のデータをもとに、
沈没船の位置を⛵️アイコンで地図上に表示します。アイコン
をタップすると詳細情報を確認できます。
- 海底障害物の表示:
魚礁などの海底障害物を🎣アイコンで地図上に表示します。
アイコンをタップすると種別・位置情報を確認できます。
- ボタン説明を追加: 地図画面右上の「?」ボタンから、各
操作ボタンの説明を確認できます。

App support

About the developer
OPEN SYSTEM DESIGN
h.umeda@osdw.com
15-56, HOJOCHO, NISHI-KU SAKAI, 大阪府 593-8302 Japan
+81 90-8932-4685