Switching from one plan to another

First of all I appreciate your efforts to bring such a great service. I'm using free account right now and want to upgrade to hacker plan. But i want to know that after upgrading to hacker plan can I upgrade and switch to other plans. For instance I don't need that much space and other resources right now for my website but later in time I would have to get more space and resources for it. Can I switch to another plan so easily? Thank you.

yes, you can switch at any time.