is Lovable.
It will be not the most beautiful one, however in many instances it will be a quite extensively clickable one and the beauty of it, if you write very detailed app / platform / product description it will create your mock-up in one go / in one credit, which you have five of, free, daily, which means you can potentially create up to five mock-ups per day, which is from my point of view is simply beautiful.
Most of them will be in Lovable preferred colors unless you specify the colors in the platform description, too.
At the time of the writing this text, I’m (currently) not affiliated with them in any shape or form.
This is just a heart-felt experience / share and absolutely not a recommendation (I don’t want to be sued by you, pick your choices yourself and very carefully)