WindCalc vs Sun n Moon for iPad Usage & Stats
This app converts apparent wind to true wind or ground wind, depending on the inputs for vessel speed and heading. This is a computation needed daily by sailing vessels underway and by ships reporting weather to national agencies. Use SOG and COG from the GPS for speed and heading to get the "true wind" used in official forecasts (sometimes called "ground wind") or use true heading derived from compass heading and knotmeter speed to get the" true wind" used on sailboat’s polar diagrams (sometimes called "water wind). Likewise this app does the reverse computation, true wind to apparent wind, so a mariner can forecast expected apparent wind based on a forecasted true wind change and known true wind boat speeds from a polar diagram. This allows mariners to plan for the sails needed and the courses available to them when the new wind appears. The app is designed with a simple, clean interface for efficient use.
- Apple App Store
- Free
- Weather
Store Rank
- -
Know when the sun and moon rise and set anywhere in the world. This top rated app in the weather category has been completely redesigned for the iPad. For any place on earth it will calculate:
- Sunrise/Sunset
- Moonrise/Moonset
- Moonphase calendar
- Moon phases animation ** New high resolution images
- Compass showing sun and moon positions
Key Features
• Sunrise and sunset times (no network connection required)
• Moonrise and moonset times
• Moonphase calendar shows phase of moon for each day of the month
• Specify location by 4 methods:
1) GPS or location services
2) Choose from a list of cities worldwide
3) Latitude and longitude
4) Google Maps
• Phase of the Moon/Percentage Illumination
• Compass view for navigating by knowing the position of sun and moon (slider animates position and elevation for different times during the day)
• Save a location (startup to the saved location or automatically find current location)
• Select any date. Quickly switch between dates using arrows or return to current date.
• Easy to read display (in 24 hour or am/pm format)
• Handles time zones and daylight savings time
• Shows past/future dates for northern/southern extremes when sun is down/up all day
• Accurate times (NOAA standard) calculated right on the device (network connection not required)
• Details view - time of solar noon, current altitude and elevation for sun and moon
• Handles portrait and landscape views
- Apple App Store
- Paid
- Weather
Store Rank
- -
WindCalc VS. 
Sun n Moon for iPadDecember 8, 2024