How to turn my blynk project into an android app

hi I would like to know step by step (like a tutorial) how to publish my project on google play store.
does it have any charge?
thanks guys.

They do it for you

I don’t know if they do stuff for non business, would like to know aswel

For your business or personal use, they charge to do all that for you, as that is their Business Model ;)… email them to inquire for more info.