Pascal Barometer vs Barometric Pressure Tracker

Track atmospheric pressure and predict weather changes using your device's built-in barometer. Pascal transforms your iPhone and Apple Watch into precision barometric instruments. Monitor pressure trends, receive storm warnings, and get weather predictions — all computed on-device with no internet required. FEATURES • Real-time pressure monitoring with 12-hour trend charts • On-device weather forecasting using the Zambretti algorithm • Storm alerts via push notifications • Live Activities showing pressure on Lock Screen and Dynamic Island • Flight mode with cabin altitude tracking • iOS widgets (small, medium, large) and Apple Watch complications • Hybrid calibration system for accurate readings PRIVACY FIRST All data stays on your device. No accounts, no cloud sync, no tracking. Location is used only for GPS altitude calibration and is never stored. TECHNICAL Pascal uses Apple's Core Motion framework to access the barometric sensor, delivering sub-Pascal resolution. The hybrid calibration system combines GPS altitude with relative altitude tracking to filter out elevation changes and surface true weather signals.

You can feel it before it arrives — the headache building behind your eyes, the sinus pressure, the old ache in your joints — and for years everyone has told you it's in your head. Barometric Pressure Tracker shows you the pressure change before it reaches you, so you can see it coming instead of getting blindsided. By the time the pain lands, you're already behind — reaching for medication, canceling plans, pushing through a day you can't focus on. Most weather apps bury pressure three taps deep, and barometer apps just throw a number at you. You don't need another gauge. You need to know what's coming, and whether it's connected to how you feel. Barometric Pressure Tracker takes that guesswork off your shoulders. SEE WHAT'S COMING, NOT JUST WHAT'S NOW • Current pressure and trend in plain language — stable, rising, falling, or a big change ahead • A clean pressure chart that maps the hours in front of you, with the changing windows highlighted • See the day broken into calm and changing windows, so you know when to take it easy • Track pressure for home, work, and the places you travel GET THE HEADS-UP BEFORE THE SWING • Pressure-change alerts that reach you hours before a swing arrives • Set your own sensitivity — major swings only, or every meaningful shift • A daily briefing each morning: today's outlook in one calm line, even on quiet days • Home Screen and Lock Screen widgets, so the next change is always one glance away FIND OUT IF IT'S REALLY THE PRESSURE • Log how you feel in seconds — headache, migraine, sinus, joint, vertigo, and more • Severity, time, an optional note, a medication toggle — no bloated diary forms • See your symptoms laid right over the pressure curve and spot the pattern yourself • Export a doctor-ready PDF or CSV to bring to your next appointment BUILT FOR REAL LIFE • People whose headaches and migraines seem to track the weather • Anyone with sinus pressure, joint pain, or old injuries that flare before a front • Folks with vertigo or ear pressure who feel "off" when the weather turns • Caregivers keeping an eye on someone who's weather-sensitive • Travelers and commuters who need pressure for more than one place PRIVATE BY DESIGN • No account required — start the moment you open it • Your symptom logs stay on your device, not on a server • No data sold, no third-party tracking • Powered by Apple Weather, with pressure in hPa/mbar, inHg, or kPa FREE TO START, PRO WHEN YOU'RE READY Current pressure, today's trend, the 24-hour chart, and quick symptom logging are always free. Pressure Pro unlocks the full picture: the extended 48-hour forecast, pressure-change alerts with custom thresholds, the daily briefing, widgets, your complete symptom history with the pressure overlay, doctor-ready exports, and multiple locations. Pro comes as a weekly or annual subscription, or a one-time lifetime purchase, with a free trial on eligible plans. Prices are shown in the app and may vary by region. Subscriptions renew automatically unless turned off at least 24 hours before the period ends; your Apple ID is charged at confirmation, and you can manage or cancel anytime in your account settings. Barometric Pressure Tracker is a weather and wellness tool — not a medical device. It doesn't diagnose, treat, or predict any condition. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Stop getting blindsided by the weather. See the pressure change before it reaches you — and finally find out whether it's connected to how you feel. Download Barometric Pressure Tracker and get a calm heads-up before the next front rolls in.