Build a number guessing game — without writing code

You don't need to learn to code to make a number guessing game. Just tell Otto what you want, and you'll build it together — step by step, in plain English. Free to start, no login.

Build a number guessing game now →

Your first version takes minutes · no experience needed · it's 100% yours to keep.

Step 1

Describe it

Say what you want like you'd say it to a friend. Otto asks the right questions.

Step 2

Watch it come alive

Otto builds a working version with you and you see it run, right on your screen.

Step 3

Make it yours

Change anything, then share the link or save it to your device. No code, ever.

Build something else

Whatever's in your head — Otto builds it with you.

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