Describe a tool in one sentence and Fly writes the whole thing. Launch it here and anyone can use it, on their own account, at no cost to you.
One sentence about the tool you want. Fly writes the page, the layout and the wiring.
Press Launch and it goes to review. Once it is approved it has a public address anyone can open.
Whoever uses it runs it on their own account. Running your app costs you nothing, forever.
Every app shows how often it was opened. The busiest ones rise to the top of the shelf.