Quote Originally Posted by orky7 View Post
as @"wysota" stated can i really do that...i mean can i first make the software if its catching ground then buy a licensed Qt and relaunch the software with different name or version.....
There used to be a special catch when talking about licencing with the Trolls. Sometimes they allowed you to switch to commercial licence if you paid the fee for the whole time-life of your application as (L)GPL. So if you developed an application under GPL for two years and wanted to switch to commercial, you'd have to pay for those two years and for the next year (as usual).

P.S: Qt is very very expensive almost $3000 one user one platform as compared to visual studio which cost $800 around.
Could you remind me how expensive is Visual Studio for Linux or for Mac?

By the way, there is also a question what you get in return for that $800 and that $3000...