No internet required. Works fully offline for hiking, climbing & cycling: GPS altitude, pressure, speed, coordinates, compass, sunrise/sunset, and photo watermarks

Realtime Altimeter - Your Pocket Outdoor Dashboard

Built on iPhone's GPS and barometer, delivering millisecond-accurate altitude, coordinates, pressure, and speed. No account, no subscription, no internet required. Everything stays on your device.

======================== KEY FEATURES ========================

[LIVE READINGS] · Altitude (meters / feet) · Pressure (mmHg / kPa / mBar / atm) · Coordinates (DMS / decimal / reverse-geocoded / sunrise-sunset) · Speed and heading · True-north compass

[HISTORY CHARTS] · 1h / 6h / 24h / 7-day ranges · Altitude and pressure dual charts · Min / Max / Current at a glance

[TRACK RECORDING] · One-tap start for hikes, climbs, or rides · Distance, elevation gain, loss, average speed · Continues recording when screen is locked · Export GPX, compatible with every outdoor app

[PRESSURE WEATHER TREND] · Predicts storm / rain / stable / fair weather from barometric changes · Works entirely offline

[ALTITUDE CHECK-IN ALBUM] · Auto-logs position when you save a watermarked photo · Map view of all your spots · 6 outdoor-themed watermarks: Peak Line, Summit Badge, Trail Sign, GPS Watch, Expedition Stamp, Topo Map

[OUTDOOR TOOLKIT] · Spirit level and slope meter · Sunrise / sunset and moon phase · Compass bearing lock · Voice altitude announcements

[ACHIEVEMENTS] · Summit badges, distance goals, storm chaser, and more · Unlocked locally, no account needed

[ECOSYSTEM] · Home Screen and Lock Screen widgets · Dynamic Island Live Activity (iOS 16.1+) · Standalone Apple Watch app

======================== WHY REALTIME ALTIMETER

· 100% local data, nothing uploaded, no account · Zero ads, zero subscriptions, zero in-app purchases · Battery-optimized for all-day tracking · Full English and Simplified Chinese support · iPhone, Apple Watch, widgets, all included

Whether you are hiking, climbing, cycling, skiing, flying, or just curious how high up you are right now, Realtime Altimeter is the simplest and most reliable companion.

Download and start your first track today.