Android Market payment option for updates

I basically only need a confirmation that I am not wrong from what I found on the net. Lets assume I have an app on the market for 1 USD in Version 1.0. Now I have a version 2.0

a) for 1 USD 开发者_如何学编程as well
b) for 2 USD

Someone who has bought version 1 already, what option does he have and how much does he have to pay? Am I right that all the future updates to the app are for free?

Thanks, A.

Even if you increase the price, the users still have access to updates. New users will have to pay the new price.