I think Revo uninstaller does not work as they say.

I bought Revo uninstaller as i though it removes every trace.
But the other day i installed an app with 10 uses trial with Revo monitoring . Then i removed it with Revo uninstaller.
Yesterday when i needed that application it said that trial limit reached.
So should i ask for refund from Revo as it didn't removed "trace" of the software?

Revo Uninstaller was never designed to get around the limits of trial software. It is possible that the software enforces it's limits by using a remote server which Revo Uninstaller has no access to. I can imagine other possibilities as well.

So should i ask for refund from Revo as it didn't removed "trace" of the software?

Depends on Revo Uninstallers terms.

Do you know any app which can do?

No program can ever warrant to remove every trace another program creates, it's simply impossible to know for sure what files/registry keys something uses and revert them. "Cleaner" programs of course will advertise themselves as capable, but it's not technically possible for them to actually achieve 100% accuracy.

They work by doing file/registry searches (the very same you can do by yourself) by program name/company name/whatever related they find, and asking to delete those. That's based on the fact that programs typically create their settings in a folder named after themselves, but in fact, they can create anything with any unrelated name, which Revo will happily ignore, reasonably. It basically makes a more or less educated guess, but that's all about it.

And typically, those absurd "10 times" use restrictions are stored in something "hidden", with a random name maybe so it's intentionally difficult to find. If you really want to crack it, restore point before the first use, or reformat every 10 used, that's the only thing I can tell you. Or purchase the program...............