sanCheck analyzes real-time weather data from the Korea Meteorological Administration to tell you whether it's safe to head out. Check temperature, precipitation, air quality, and wind at a glance, and set your own custom rules for going outside. Receive push notifications for weather forecasts in your registered area.
No app store required — install directly from your browser.
🍎 iPhone · iPad
If not visible, find it in the ··· menu to the right of the address bar
🤖 Android
In Chrome, tap the install icon in the address bar or select 'Install app' from the menu (⋮).
📲 Add to Home ScreenAll regions covered by the Korea Meteorological Administration (KMA) — down to the si/gun/gu level nationwide.
As a PWA (Progressive Web App), the last loaded weather data remains viewable offline. An internet connection is required to fetch the latest data.
Official meteorological data from the Korea Meteorological Administration (KMA) short-term forecast API.
Every hour. KMA publishes forecasts at 40 minutes past the hour; sanCheck updates accordingly.
Open Settings, enable notifications, and register your area. You will then receive push alerts for that area's weather forecast.
In Settings you can choose between WHO Extended (default), WHO 2021, and Korea MOE standards.
A shareable code for a custom Weather Indicator you created. In Settings → Weather Indicators, tap the share button (⤴) next to an indicator to copy the code. Paste it anywhere to share. Others can paste it under 'Add by code' to import the indicator.
Weather forecasts, UV index, radar images
PM10, PM2.5, and other air quality data
24 solar terms and seasonal folk days (Chobok, Jungbok, Malbok, Hansik, Dano)