difference between trial apps and paid apps

[ShreyansShah]

is anyone can tell me how to find the difference between trial app and paid app?
i tried to find a way so that we can get info about what shall we gain after paying for that app and before paying (i.e. using it as a trial).
but there in almost m 90% or more, its not disclosed that, whether it is a time limited trial, or feature limited trial or just a full featured ad supported trial.
i mean, anyone will not spend bucks just to get an ad-free app, just to support the developers. some people may do that, but most of the people shall not pay every time.

so if is there any way to find before installing, i am really interested in finding it.

 

[rockstarzzz]

You can't.

Some apps are time limited (will say this in about page of app or as a toast when you launch app) or some apps may be with limited functionality - says in app description or ad-supported. People DO pay for removing ads. I am one of those. I HATE ads.