Altimeter Gps

Know exactly where you stand — whether you're hiking a mountain trail, flying, cycling, or simply exploring the outdoors. Altimeter fuses your phone's GPS and barometric pressure sensor together for the most accurate altitude reading possible, then surrounds it with a full suite of professional-grade outdoor tools.

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CORE ALTITUDE FEATURES
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▸ Dual-sensor fusion — GPS + barometer combined (70 % baro / 30 % GPS) for maximum accuracy
▸ Large, easy-to-read digital altitude display with animated gauge
▸ Real-time vertical speed with automatic activity detection (Hiking, Descending, Flying…)
▸ Min / Max altitude tracking per trip
▸ Total ascent and descent accumulation
▸ One-tap calibration against a known altitude or sea-level pressure
▸ Unit toggle: metres / feet, hPa / inHg, m/s / fpm — saved across sessions

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PRESSURE & WEATHER FORECASTING
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▸ Station pressure and QNH (sea-level corrected)
▸ Live pressure trend indicator: Rising / Falling / Steady / Rapid change
▸ Smart 3-hour weather forecast based on pressure patterns (Fair / Cloudy / Rain / Storm)
▸ Barometric altitude and density altitude
▸ Oxygen availability reference (useful for high-altitude trekking and aviation)
▸ AMS (Altitude Mountain Sickness) risk level based on current altitude

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STORM ALERT SYSTEM ⚠
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When atmospheric pressure drops 3 hPa or more within an hour, Altimeter fires an immediate high-priority notification — a classic indicator of an approaching storm. On-screen warning banner also appears in the Pressure tab. A 30-minute cool-down prevents alert fatigue while keeping you safe.

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SESSION RECORDING & HISTORY
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▸ Background recording — keeps tracking altitude even when the screen is off or you switch apps
▸ Persistent foreground notification shows live altitude during recording
▸ Full session history with name, date, duration, min/max, ascent, descent
▸ Swipe or long-press to delete sessions
▸ Detailed session statistics screen

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ELEVATION PROFILE CHART 📈
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▸ Interactive line chart of your altitude over time for every recorded session
▸ Smooth cubic-bezier curve with filled area
▸ Pinch to zoom, drag to pan
▸ Min / Max / Ascent / Descent summary overlaid on the chart

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OFFLINE TOPOGRAPHIC MAP 🗺
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▸ OpenStreetMap-based map that works completely offline once cached
▸ Live GPS position dot updated in real time
▸ All your waypoints shown as interactive markers
▸ Live track polyline drawn as you record
▸ Compass overlay, zoom controls, "My Location" button

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WAYPOINTS & NAVIGATION
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▸ Save any location with a custom name and its exact altitude
▸ View all saved waypoints with relative altitude difference to your current position
▸ Waypoints appear on the map as labelled pins

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GPX & KML EXPORT 📤
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▸ Export any recorded session as GPX 1.1 or KML 2.2
▸ Compatible with Google Earth, Garmin, Strava, AllTrails and any GPS software
▸ Share instantly via email, Drive, Dropbox or any Android share target

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DESIGNED FOR THE OUTDOORS
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▸ Material Design 3 interface — clean, modern, easy to read in bright sunlight
▸ Dynamic colour theming on Android 12+
▸ Supports system dark mode
▸ No account or sign-up required — all data stored privately on your device
▸ No internet connection needed for core features (map tiles cached locally)