Pro Altimeter vs Altimeter Elevation Watch

Pro Altimeter uses the high-fidelity barometric pressure sensor in iOS devices to measure and compute altitude. Pro Altimeter has a dead simple interface. Barometric altitude and GPS altitude are displayed in large easy to read numbers, showing units of both feet and meters, and giving realtime accuracy estimates from the hardware. At bottom are calibration and display mode buttons. The display offers a highly-readable daytime mode with black digits on an LCD-green background, and a reversed night mode that is easy on the eyes in dark conditions. That's it! Proper calibration is necessary to measure altitude from barometric pressure (this is why a pilot "dials in" the cockpit altimeter before taking off). Pro Altimeter offers four different methods for calibration -- choose the easiest and most convenient: 1. Use GPS altitude. This method correlates the measured local barometric pressure with the altitude measured by GPS. This method can be used when your device has a clear line of sight to the sky and a reliable GPS fix with good accuracy. 2. Manually enter altitude. This method correlates the measured local barometric pressure with known altitude from landmarks, elevation benchmarks, trail markers, topo maps, land surveys, etc. Altitude can be entered in feet or meters. 3. Manually enter pressure. If you have a weather station, weather report, or METAR report with equivalent sea level pressure for a nearby location, this can be used to correlate local barometric pressure to altitude. Pressure can be entered with units of inches Hg, kPa, or mb. 4. Check local airports. With the tap of a button, Pro Altimeter will locate the five closest airports within 100 miles (160km) of your present location anywhere in the world, and pull in METAR data. From that list of five, pick the airport of your choice and Pro Altimeter will import pressure data for calibration. Once calibrated, Pro Altimeter keeps track of the time since its last calibration. Because weather and local barometric pressure change over time, the app will warn you when 6 hours have elapsed since the last calibration by flashing the "CALIBRATE" button. You should calibrate as frequently as practical -- for example, on a hike, calibrate whenever you pass a trail marker or elevation benchmark. But at a minimum, calibrate at least every 6 hours or whenever weather changes in your area. Pro Altimeter is intended for iOS devices with a built-in barometric pressure sensor (iPhone 6 and later, iPad Air 2 and later, iPad mini 4 and later, and iPad Pro). On older devices without a barometric pressure sensor, only GPS altitude and accuracy will be displayed. If you have an Apple Watch, check out the new Pro Altimeter for Watch and get all this same functionality on your wrist!

Track your current altitude and elevation gain at a glance, whether you’re hiking, climbing, mountain biking, or driving mountain roads. Altimeter – Elevation Widget & Watch Complication gives you a precise altimeter for your Apple Watch and iPhone. Keep your current altitude visible on your watch face, home screen, and iPhone Live Activity. The native CarPlay dashboard is a separate view designed for the drive, with current altitude, climb or descent per minute, grade, direction, peak, and gain. Try Siri with: “Siri, start Live Activity in Altimeter.” You can also ask: “Siri, what is my current altitude in Altimeter?” This app is designed for outdoor lovers and works as: • A complication for Apple Watch Series 4 or newer (watchOS 10.6 or later) • A home screen widget for your iPhone Features: • Real-time altitude and elevation gain • Complication for Apple Watch faces • Native CarPlay dashboard: current altitude, climb/descent per minute, grade, direction, peak, and gain • Live Activity on iPhone: current altitude, peak, and gain on the Lock Screen and Dynamic Island • Home screen widget for quick altitude checks • Siri, Shortcuts & Spotlight: start Live Activity, ask for current altitude, save altitude readings, and get ready for the new Siri experience this fall • Graphical daily profile and gain timeline • Heatmap + flowline for monthly and yearly analysis • Background significant-location updates for efficient day profiles • HealthKit Flights Climbed support for more robust gain calculation • Switch between meters and feet Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/