Pressure drops before storms. Pascal tells you when. Your iPhone has a barometer. Pascal turns it into a personal weather station that detects pressure fronts in real-time.
Useful if you get migraines, spend time outdoors, or just want to know why you feel "off" today. The hard part? Walking upstairs creates the same pressure shift as a storm front. Pascal's hybrid calibration system filters out your movement to reveal the true weather signal.
No internet required. Pascal uses the Zambretti Forecaster—a 110-year-old meteorological algorithm—combined with on-device ML that learns your local patterns.
| RAPID DROP | Storm likely within 6-12 hours |
| STEADY FALL | Rain approaching |
| RISING | Clear weather building |
After ~25 predictions, Pascal becomes personalized to your exact location. The ML model learns what pressure patterns actually mean where you live.
Interactive pressure charts with 3h/6h deltas. See how fast conditions are shifting.
Converts to sea-level pressure so your readings match official weather stations.
Track elevation changes in real-time. Surprisingly fun once you start noticing.
Background sampling every 15-30 minutes. No battery impact.
Home screen widgets in multiple sizes. Current pressure and forecast at a glance.
Your movement is automatically filtered out. What's left is pure weather signal.
Layer 1: Movement compensation filters stairs, elevators, and driving using barometer's relative altitude.
Layer 2: GPS converts to sea-level pressure so you can compare with weather stations.
| SENSOR | Bosch BMP280 (±1 hPa accuracy) |
| RESOLUTION | 1.5 cm altitude equivalent |
| STORM THRESHOLD | 6+ hPa drop in 3 hours |
| HISTORY | 48 hours rolling |