If you downloaded a trustworthy wallet your funds (as long confirmed) should be instantly usable.
You may try to look in the transaction history to find your ingoing BTC's and look for the transaction ID.
Then you can lookup this transaction in a blockexplorer (e.g.
https://blockchain.info) and check its status (unconfirmed / confirmed).
If you can't access any further transaction details in your wallet it might be a malicious application.
Like the others already mentioned, the name of the app would be pretty helpful.