WEATHER SIMULATOR

The sky,
in your hands.

See how the sky and weather work by trying it yourself
The layers of the atmosphere from the troposphere to the thermosphere, how rising air builds clouds, how raindrops grow, hot winds that cross mountains, lows and fronts, a typhoon's eye and eyewall, how radar and satellites see clouds, sea and land breezes, the global circulation, the meandering jet stream, and El Niño and La Niña. 11 modes that let you explore earth science and introductory meteorology with your fingers.

Download on theApp Store Get it onGoogle Play

Free11 modes73 languagesNo accountiPhone · iPad · Android

11modes

3categories

$0no in-app purchases

73languages

Modes

11 modes

Three categories: how the atmosphere works, changing weather, and Earth's climate. Move a slider or tap a button and watch the clouds, winds and graphs respond instantly.

How the atmosphere works4

Vertical structure

From troposphere to thermosphere

How clouds form

Adiabatic cooling and condensation

How rain forms

Warm rain and cold rain

Foehn windNEW

Hot, dry wind over mountains

Changing weather4

Fronts and lows

Where cold and warm air meet

Typhoons

Eye, eyewall and rainbands

Radar and satellite

Seeing rain and cloud tops

Sea and land breezesNEW

Wind that turns with the day

Earth's climate3

Global circulation

Three cells and surface winds

Jet stream

Meandering westerlies and Rossby waves

El Niño and La Niña

The Pacific temperature see-saw

Screenshots

Move, observe, understand

Change the temperature, humidity, sea surface temperature or mountain height, and cloud heights, typhoon strength, lee-side temperatures and wind directions respond in real time.

**Eye, eyewall and spiral bands**Warm the sea and the typhoon grows. Watch the peak wind, central pressure and class change.

**Where clouds begin and end**Temperature, humidity and stability decide whether you get cumulus or a towering cumulonimbus.

**Hot, dry wind over mountains**Air that rains out on the windward side comes down the lee side warmer and drier.

**Fronts change the weather**The life of a low, and how temperature and wind change as each front passes.

**Rain and clouds from afar**Rain intensity in dBZ, and cloud height and thickness in infrared and visible images.

**Sea breeze by day, land breeze by night**Land and sea warm differently, so the wind turns around over the day.

Features

Built for learning

Hands-on

Change the temperature, humidity, sea surface temperature, mountain height or time of day with sliders and buttons, and watch the clouds, winds and graphs respond.

Weather made visible

Rising air, cloud droplets and raindrops, fronts and isobars, the swirl of a typhoon, the meanders of the jet stream — the invisible motions of the atmosphere, drawn and animated on screen.

Explanations included

Every screen explains the science behind it — lapse rates, dew point, terminal velocity, the Z–R relationship, the Coriolis effect, Rossby waves and more, with real examples and numbers.

73 languages

English, Japanese, Chinese, Korean, Spanish, Arabic and 67 more. The app follows your device language automatically.

Free, no account

Every feature is free. No in-app purchases, subscriptions or sign-in. The only ad is a Pangle banner at the bottom.

Easy to use anywhere

Dark and light themes, landscape, and iPad and tablets. Everything except ads works offline.

Pricing & ads

The app is free. There are no in-app purchases, subscriptions or paid unlocks, and no account is needed.

A Pangle banner ad is shown at the bottom of the screen. On iOS, the App Tracking Transparency (ATT) prompt appears at launch, and ads are personalized only if you allow tracking. On Android, the app asks once whether ads may be personalized. Either choice can be changed later from "About this app" > "Ad settings".

The app is an educational simulator for learning how weather works. It does not show real forecasts or warnings.

Requirements: iPhone and iPad with iOS 15.0 or later; Android 7.0 (API 24) or later phones and tablets.

Download

A weather lab in your pocket.

Free on the App Store and Google Play.