مُزْن muzn · the cloud that carries rain

What if it rains here?

Watershed is a rain and flood simulation sandbox. Make it rain anywhere on real terrain (deserts, mountains, forests) and watch where rivers, lakes and flash floods form.

Buy on Steam · $16.99 → Get it on itch.io See Watershed Watch the trailer

The land remembers.

Every valley is the shape of rain that already fell. Every coastline is the height the sea happened to be. The first roads went from one well to the next, and many of them are still roads.

So we let you replay it.

Rain on a real mountain and watch it run to the sea. Drain the Gulf back to the Ice Age. Roll the atlas to the Bronze Age and send a caravan across what remains, in the year you choose.

Instruments, not oracles.

These are teaching sandboxes. Every layer shows where its data came from. Where a model is rough, the app says so, in plain words, before you trust it.

Apps

Watershed

Rewrite the Earth's water and time.

Draw an area anywhere on Earth, pick a storm, and watch real elevation data fill its valleys. Water runs downhill and gathers into rivers that find their way to the sea. Then drain the oceans back to the Ice Age, roll the atlas back three thousand years, and see whether people could live and travel there.

WeatherOceanTimeJourney

Buy on Steam · $16.99 → Get it on itch.io Windows About Watershed

Rain12 – 60 mm/hsix real storms, or any number you type; live GPU physics

Sea level−500 m to +80 mon real bathymetry

Time3000 BC → todaycities, peoples, routes, empire borders

Journeycamel or oxday by day, well to well

iPhone and iPad

Rain Bucket

Bring a storm to any real landscape and watch the rain gather and flow downhill.

About Rain Bucket

iPhone and iPad · $4.99 · Education

iPhone and Android

Float

A calm balloon game for iPhone and Android. Tap colourful balloons, keep them floating over a quiet garden, and play at your own pace.

Download on the App Store → Get it on Google Play →

More instruments are on the bench. They will share the same rule: real data, sources shown.

How we work

Three rules for every app.

Real data, shown.

Terrain from public elevation surveys, imagery with its provider named, historic sites from open registers. The source of every layer is one click away inside the app.

Physics you can watch.

Water is not an animation. It is a shallow-water solver running on your graphics card, with friction, infiltration and evaporation, and you can pause it and probe any point.

Says what it isn't.

Nothing here is a calibrated engineering model. The apps say so, and they show you the assumptions rather than hiding them behind a confident picture.

Contact

Schools, museums, curious people.

Licences for a class, a question about the data, or a place you think we should look at:

info@mozonapp.com