I’m trying to build an multiplatform app but I do not understand the payment model, Do I have to pay for each download made in Appstore or other stores and Do I have to pay every month the price or only while I am developing the project.
If I want to make changes later do I have again to pay!?
What exactly are you talking about? Pay for what?
Ionic Framework is free.
As you can see there are some paid plans?
Do I need them to create app with Ionic? Why they are there?
No I don’t see as you didn’t post the link to what you are talking about. I assume: http://ionicframework.com/pricing?
Then no, you don’t need any of these. These are pricing tiers for Ionic Pro, a service with additional backend functionality for Ionic apps that are built with Ionic Framework.