Isoline – Weather Graphs

Mason K Studio

About this app

Tired of weather apps that send you to a slow website just to see a graph?

Isoline shows every weather graph instantly, right inside the app. Tap any card and a detailed chart slides up. Swipe left and right to move between days, drag down to close.

EVERY GRAPH, ONE TAP AWAY
- Temperature and feels-like, hour by hour
- Chance of rain and expected amount
- UV index with when to wear sunscreen
- Wind speed, gusts and direction
- Humidity and dew point, visibility, pressure
- Touch and drag any graph to read each hour

AT A GLANCE
- Hourly forecast with sunrise and sunset
- 10-day forecast with temperature range bars
- "Rain at 1 PM" alerts at the top of the screen
- Today vs. the 10-year average, moon phase and air quality

FORECAST MAPS
- 48-hour maps for rain, temperature, wind and clouds
- Play the forecast forward hour by hour

MAKE IT YOURS
- Four themes: Glass Bento, Minimal Data, Expressive and Expressive Dark
- Gentle weather animations (can be turned off)
- English and Korean
- °C/°F, km/h, mph, m/s, knots, mm/in, km/mi, hPa/inHg/mmHg
- 12- or 24-hour time
- Home-screen widget

PRIVATE BY DESIGN
No account, no ads, no tracking. Your location is rounded to about 100 m on your phone before it is used for the forecast.

Weather data by Open-Meteo.com (CC BY 4.0). Maps © OpenStreetMap contributors, © CARTO.

What’s new

• Softer, cleaner sky backgrounds — clouds no longer get in the way of text
• Home screen widgets: 4×2 forecast now shows day & night icons with rain chance
• Expressive theme: tidier header, clearer hourly forecast and icons
• Minor fixes and polish