Windy is a weather forecasting tool that provides real-time weather information and interactive maps for outdoor activities.
Free with in-app purchases
Best qtVlm Alternatives ranked by AI · updated Aug 2026
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qtVlm is a marine navigation and sailing-weather application for route planning, weather routing, AIS, and virtual sailing. It serves cruisers and performance sailors on desktop and mobile platforms, with strong GRIB and routing tools.
Top 6 qtVlm alternatives
zyGrib is an open-source desktop application for downloading, viewing, and inspecting GRIB weather data, mainly used by sailors and weather enthusiasts. It...
Pros
- Free and open source
- Supports map-based GRIB visualization and meteograms
- Works with several forecast variables and weather models
Cons
- Original project is no longer actively maintained
- Older interface than XyGrib and modern marine-weather services
- Limited integration with current navigation and routing workflows
TIMEZERO is a leading marine navigation software providing advanced features for professional sailors.
Custom pricing based on features
4
OpenPlotter
Sailoog
OpenPlotter is a free, open-source marine navigation and boat-integration platform for Raspberry Pi computers. It combines chartplotting, Signal K and NMEA data...
Pros
- Integrates navigation, sensors, Signal K, NMEA, and vessel hardware in one Raspberry Pi platform
- Open-source and highly configurable compared with proprietary marine electronics
- Supports low-cost DIY installations and a broad range of community plugins
Cons
- Requires more setup and troubleshooting than turnkey chartplotters
- Raspberry Pi hardware can be less rugged and reliable than dedicated marine equipment
- Interface consistency is lower than polished commercial navigation apps
Free; optional charts and hardware cost extra
PredictWind offers weather forecasting services tailored for sailors, providing accurate weather data for route planning and navigation.
Pros
- Accurate weather data
- Route planning tools
Cons
- Subscription required for full access
6
iNavX is a popular marine navigation app that offers a wide range of features for boaters including weather information and AIS integration.
Pros
- Weather information
- AIS integration
Cons
- Paid app
- Learning curve for new users
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