Pascal 1.6 is a bigger update: honest trends, new alerts, longer history and iPhone Duo support. • Trend instead of forecast. The weather forecast was not reliable enough, so it is gone. Pascal now shows what your barometer actually measures: whether pressure is steady, rising or falling, and how fast, over 3, 12 and 24 hours. • Pressure swing alerts. Get notified when pressure rises or falls by 4, 6 or 8 hPa within 12 hours, and look back over 60 days of swings in the swing log. • Altitude tracking. Altitude mode now shows your total climb and descent. • Longer history. Switch the chart between 12 hours, 48 hours and 7 days. • iPhone Duo. A full instrument panel when unfolded, a layout that suits standing it up like a laptop, and the complete app on the front screen. • Rock-solid readings. Pressure no longer jumps when you change height or GPS altitude goes wrong: every altitude is checked against the barometer, and Pascal recovers on its own after a move. • More reliable background sampling, with fewer gaps in your history.

Bug fixes for GPS and altitude tracking. • Fixed sudden pressure jumps caused by inaccurate GPS altitude on iOS 27. Every altitude is now checked against the barometer before it is used. • Altitude now comes from a proper satellite fix, so GPS calibration is more accurate and available more often. • Changing height (hills, stairs, lifts) no longer adds a false pressure rise. • More reliable background sampling, with fewer gaps in your history.

Minor UI bug fix with the altitude display.

Background refreshes have been tuned for a rock-steady 15-minute cadence — your pressure trace now flows uninterrupted from dawn to dusk, with no mysterious gaps where the barometer went quiet. Storm alerts are yours to shape. Dial sensitivity to Severe for only the serious systems, Moderate for the meaningful shifts, or All to catch every tremor in the atmosphere. Pair it with a daily cap and Pascal will respect your attention — a quiet companion when the sky is calm, a sharper voice when the pressure starts to fall.

Bug Fixes: Fixed: Rapid pressure drops (storms) could permanently block new readings Fixed: Race condition causing missed samples on launch and in background Improved outlier detection that handles extreme weather without false rejections

Weather Forecasting - Improved prediction accuracy and reliability. Altitude Mode - You can now display your altitude over-time - Data points visible on altitude chart for easier reading - Chart toggle moved below the forecast card for cleaner layout Chart Fixes - Fixed axis labels getting cut off on pressure and altitude charts - Improved chart padding for better readability

### Added - **On-Device Machine Learning**: Personalized weather predictions that learn automatically - **Instant Bootstrapping**: Uses existing pressure history to personalize immediately - **Adaptive Forecasting**: Combines 110-year-old Zambretti algorithm with modern ML - **Overnight Sampling**: Charging-aware background scheduling for better overnight coverage - **Diurnal Correction**: Removes natural daily pressure cycle for more accurate trend detection - **Storm Alerts**: Push notifications for rapid pressure drops and storm conditions - **Live Activities**: Dynamic Island and Lock Screen pressure display (iOS 16.1+) - **Flight Mode**: Cabin pressure tracking with altitude estimation ### Fixed - Background processing tasks now run properly overnight when charging ### How ML Works Pascal learns your local weather patterns automatically — no user action required: 1. **Instant bootstrap** — Seeds model with Zambretti archetypes on first launch 2. **History training** — Walks through existing pressure data to create observations 3. **Auto-evaluation** — After 6 hours, Pascal checks what actually happened 4. **Kernel likelihood** — Similar past conditions inform future predictions **Result:** If you have a week of pressure history, Pascal is personalized immediately. New users reach personalization after ~25 auto-evaluated predictions. All learning happens silently in the background. No feedback buttons needed.