Marine Barometer vs Windtrack

Marine Barometer is a barometer sensor interface that is uniquely designed to meet the needs of mariners who rely on accurate atmospheric pressure for weather routing and the evaluation of weather maps. Pressure readings can be manually saved permanently along with the latitude, longitude, and time of the reading. If a sensor offset has been applied, that value is also stored with each recorded pressure. These recorded pressures can then at the navigator's convenience be transferred to the vessel's printed logbook. The GPS sensor is accessed for latitude and longitude only. The elevation of the sensor (your iOS device that includes a barometer) above sea level must be entered manually. Elevation values from the GPS are not accurate enough for the intended application. The concept of sea level pressure is explained along with how it is determined from the sensor reading. Instructions are provided on how to check the calibration of the sensor, and a sensor offset can be applied as needed. Links to sources of accurate sea level pressure are included. Sources of accurate elevation are included for use on land. The standard units for marine applications are millibars (mb) or hectoPascals (hPa). The main pressure display can also be set to inches of mercury, millimeters of mercury, or kiloPascals. However, because the primary reference pressures that would be used to check the sensor calibration are in mb, the sensor calibration must be set using millibar units. Reference links are provided for learning more about the tactical use of pressure for weather forecasting and weather map evaluation. Discounts are offered for barometer related reference books.

Windtrack doesn't just show the forecast. For the date you choose, it tracks how the forecast changes over time, analyses it, compares it with past years and presents it as a clear report. Other apps show only the latest forecast. You look weeks ahead, see "Saturday 25 knots, let's cancel", and Saturday arrives with a flat calm sea. Windtrack queries five global models four times a day for the point and time you choose, and never deletes an update. You see which way the forecast is drifting and whether the models are coming together. A narrowing spread between models is a far stronger sign of confidence than wind speed alone. NEW — WIDGETS, APPLE WATCH AND CARPLAY (Premium) Home Screen and Lock Screen widgets, the Apple Watch app and complications, and CarPlay show your tracked point's average wind, direction and gusts at a glance. Widgets refresh automatically as forecasts update. Widgets and Apple Watch require iOS 26 and watchOS 26. FEATURES - Five global models in one place: ECMWF, ICON, GFS, Météo-France and UKMO — four updates a day - How the forecast changed over time: see in one chart how the forecast for your target date has shifted over the days - Spread between models: confidence grows as the models converge — a data-driven answer to "go or no go" - Captain commentary in your language: AI turns all the data into plain sailor's language — Turkish, English, German, Russian and Greek - Notifications: you are notified when the forecast for your point changes significantly; the commentary is prepared before the notification is sent, so it is waiting when you open it - Offline access: even out of coverage, the latest forecasts, charts and commentary open; every item shows when it was fetched, so stale data never fools you - Spatial pattern: how the wind behaves across the area, from four satellite points about 20 nautical miles north, south, east and west of your point - Historical context: for points within POSEIDON coverage, a comparison with the same date window over the past five years — is this wind normal or unusual? - High resolution: for points in the Mediterranean and the Black Sea, the 5 km Greek POSEIDON model comes in three days before the target - Observed: follow live measurements from observation stations to see whether the forecast held; the station's distance in miles is always shown WITH PREMIUM - Unlimited new points - 3 tracking points at once - Forecasts up to 15 days ahead - Points stay open indefinitely - Detailed point analysis and captain commentary - Verification report card and archive - Widgets, Apple Watch and CarPlay Sign in within seconds with your Google or Apple account. Note: All weather models can be wrong. Windtrack does not run its own weather model; it collects the forecasts of existing global models and tracks and analyses how they change over time. The decision to put to sea is always the captain's. Privacy Policy: https://windtrack.tr/gizlilik/en/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/