This site connects out to your wallet. Your keys, and the sessions other apps hold, stay on the device that owns them.
Connect a wallet to use this app. NexVault on the web never holds a key — your wallet signs, and shows you the request first.
The dApps your walletis connected to are listed by the wallet, not by this page — a site cannot see, or revoke, another site's session. Open the NexVault extension or the phone app to review them and cut any you no longer recognise.