[dorait]

Build a simple functional prototype (also known as Minimum viable product) and give it away free.

This will start a whole series of next level tasks and some of them you may not even be aware of with just an idea.

Track usage and interest in your prototype and decide whether it is worth building the full product.

[thumma19]

"Give it away free" is one thing that most of the times gives false results.

[Richallen1]

I completely agree with this. If a product is meant to be free then give it away if you intend on charging some day you need top get people to pay from the start. Even if its a small amount.

Also if users will pay for a buggy prototype then it is clearly something they really want.