Change one thing. See what happens.

Watch a tiny world live through 50 years in under a minute. Then change one thing and see both futures side by side.

We’ll only email you about the launch. Unsubscribe any time. Privacy

Two copies of a medieval village. One gets electricity.

More worlds

100,000 rabbits on an empty continent.
100 people on Mars for 50 years.

The full app

  • Ask your own “what if”.

    Describe a place and a change. Whatifery builds the world and runs it.

  • Change anything, at any moment.

    Add wolves in year 6, ban cars in year 2, stop the supply ships in year 10.

  • Keep both futures.

    Split time, compare the outcomes side by side and share the result.

Join the waitlist

Be first in when Whatifery opens.

We’ll only email you about the launch. Unsubscribe any time. Privacy

Questions

What is Whatifery?

A simulator for “what if” questions. Each world runs on a few simple rules, so you can watch one change ripple through a whole place over decades.

Is it real science?

No. The rules are simplified and some events are scripted. It’s made for curiosity, not forecasts.

Can I use it yet?

Not yet. We’re building it now. Join the waitlist and we’ll email you when it opens.

What happens to my email?

We only email you about the launch. Every email tells you how to unsubscribe (just reply), and you can ask us to delete your email at any time. You need to be 13 or older to join. See privacy.