Zambretti Barometer

Turn your iPhone into a precision barometer. Your iPhone has a real barometric pressure sensor built in. Zambretti Barometer puts it to work: live sea-level pressure, the 3-hour trend, and a heads-up when the weather is turning. All at a glance on your Home Screen, Lock Screen and Apple Watch. A live pressure gauge A crafted dial shows your mean sea-level pressure and its 3-hour trend (rising, falling or steady), with 6-hour and 24-hour markers so you can see where things are heading. Scroll back through 24 and 48 hours of history to spot a passing front or a building high. A classic barometer forecast. The Zambretti method, from Negretti & Zambra's 1915 instrument, turns your pressure, trend and wind into a plain-language forecast. It's computed from your own barometer, follows the original method exactly, in both hemispheres. Storm and clearing alerts • Alerts come from your own pressure and its trend: a storm watch or warning when pressure is falling, and a heads-up when it's clearing • On-screen banners, plus optional notifications when the app is closed • Recognises when you're driving or changing height, so travel doesn't set off false alarms Feel the weather before you see it. Many people notice pressure changes in their body (headaches, migraines, sinus pressure, aching joints) before the sky shows a thing. • An optional wellbeing log stamps each entry with the real pressure around you at the time • A summary shows what the pressure was doing when you felt off: falling, steady or rising, low or high • Export a PDF summary to share with your doctor • Kept on your device, never shared Your sensor vs. Apple Weather See your iPhone's own reading side by side with Apple Weather's sea-level pressure, plus temperature and wind. Widgets and Apple Watch • Home and Lock Screen widgets with your latest pressure, trend, 24-hour chart and any active alert • An Apple Watch app and complications, including a 24-hour pressure graph, so your latest reading is a glance away Made yours • Eight hand-crafted colour themes, with System, Light and Dark appearance • Your choice of pressure, temperature, wind and elevation units • Saved locations, lifetime statistics, and a recording log of the last seven days with one-tap CSV export • Density altitude for shooting and ballistics, in feet or metres Private by design No account, no sign-up, no tracking. Your readings stay on your device. Built for iPhone, because that's where the sensor lives.