LakeMap – Swiss Lake Charts
Depths, marinas & live levels
Free · Designed for iPad. Not verified for macOS.
All 22 surveyed Swiss lakes offline — with shallow-water alerts based on today's live lake level instead of a fixed chart datum.
LakeMap is the offline chart plotter for Swiss lakes: 22 surveyed lakes with official bathymetry (swisstopo swissBATHY3D) ship inside the app — depth contours, depth shading, seamarks and marinas all work with no connection at all.
THE DIFFERENCE: DEPTHS FROM THE LIVE LAKE LEVEL
Ordinary charts show depths against a fixed datum. LakeMap computes with the current water level (Swiss federal gauges, FOEN): the depth you see is today's depth — at low autumn levels just as after snowmelt.
PREDICTIVE SHALLOW-WATER ALERTS
The app projects your course 60 seconds ahead and warns in four tiers before the bottom comes up, with distinct alert tones. Unsurveyed water is treated as a hazard: zones without depth data render violet and raise their own alert tier instead of falsely looking safe.
CHART & NAVIGATION
• Depth contours and bands from swisstopo swissBATHY3D
• Seamarks and buoys, harbours and marinas (OpenStreetMap)
• Own position with smoothed course and speed (COG/SOG)
• Depth readout under your boat
• Automatic lake detection
WEATHER & STORM WARNINGS
Hourly wind and gust forecast per lake (MeteoSwiss ICON models), cached offline with visible age. Cues at the official Swiss storm-warning thresholds (strong wind from 25 kn, storm from 33 kn) plus official warnings for your lake.
THE LAKES
Lake Zurich, Lake Constance, Lake Lucerne, Lake Thun, Lake Brienz, Lake Biel, Lake Neuchâtel, Lake Murten, Lake Geneva, Walensee, Lake Zug, Lago Maggiore, Hallwilersee, Ägerisee, Baldeggersee, Sempachersee, Sarnersee, Lac de Joux, Silsersee, Silvaplanersee, Lungernsee, Rotsee, Greifensee, Pfäffikersee, Lake Lugano, Sihlsee, Lac de la Gruyère, Schiffenensee, Wägitalersee, Wohlensee, Klöntalersee, Lago di Poschiavo, Lauerzersee.
IMPORTANT
LakeMap is not an official navigational aid. Official charts and the shore storm-warning lights remain authoritative. Data: © swisstopo, FOEN, MeteoSwiss/Open-Meteo, OpenStreetMap.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
• 11 new lakes: Greifensee, Pfäffikersee, Lake Lugano, Lago di Poschiavo, Lauerzersee and the reservoirs Sihlsee, Lac de la Gruyère, Schiffenensee, Wägitalersee, Wohlensee and Klöntalersee. Their floors come from national-map depth contours (no sonar survey), so they are marked as orientation charts; reservoirs also flag their swinging level, which you set manually.
• Lake Lugano gets its live level from the BAFU gauge at Melide.
• Perspective view: the compass button now cycles north-up → course-up → tilted 3D view.
• Search covers every lake: harbours and services from all installed charts, each with its distance from the boat or the map centre.
• Faster first position: the boat shows immediately from the first coarse fix and sharpens as GPS settles.
• Smarter opening view: the chart opens on your last position, or on Lake Zurich when you are far from the lakes.
• Level and wind chips stay visible within 5 km of a lake, so conditions can be checked from the harbour or the road; between two lakes the nearer shore decides.
• Refreshed depth contours for all lakes.
The developer, dataWorks GmbH, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- dataWorks GmbH
- Size
- 243.8 MB
- Category
- Navigation
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Location
- This app may use your location even when it isn’t open, which can decrease device battery life.
- Languages
English and 3 more
- English, French, German, Italian
- Age Rating
4+
- 4+
- Copyright
- © 2026 dataWorks GmbH
