Marine Barometer vs Barograph Widget Off

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.

Barograph turns your iPhone barometer into a clear Lock Screen dashboard for atmospheric pressure. CURRENT PRESSURE See live pressure in mbar, hPa, mmHg, inHg, or psi. Track 6-hour and 24-hour changes with trend arrows. 24-HOUR BAROGRAM A 12-bar chart shows pressure history — each bar covers 2 hours. The live bar updates while the app is open. Past bars stay fixed; when pressure keeps falling at the floor, the chart pans up so you can still see movement. LOCK SCREEN WIDGETS • Inline — pressure, delta, and trend in one line • Panel — pressure with 6h and 24h deltas • Chart — full-width barogram for the wide Lock Screen slot CALIBRATION Match the reading to a local weather station or reference value. Calibration stays free. UNITS & SETTINGS Switch pressure units anytime. Optional lightning icon when a sharp pressure drop is detected. FREE VS PREMIUM Pressure reading, trends, and calibration are always free. Lock Screen widgets and the in-app barogram include a 7-day free trial. After the trial, unlock them forever with a one-time purchase. No subscription. REQUIREMENTS Requires an iPhone with a built-in barometric sensor. PRIVACY Pressure data is stored only on your device. No account required. Note: BaroWidget shows barometric pressure for informational purposes. It is not a weather forecast or medical device.