There maybe disclaimers that it doesn’t store any data. There is even links to the source code to prove it.
But the site doesn’t use SSL (I don’t see HTTPS in the URL of my browser) so your password is transmitted IN THE CLEAR – IT’S NOT ENCRYPTED.
Okay, you aren’t supplying a user name, but your IP address will most likely give you away as to what area you are from.
Sure the source code is available, but does the regular, every day person understand code? Who has tested it and verified that it works properly and it can’t be hacked. How secure is the website and the web host? The answer: You don’t know.
Bottom line: You shouldn’t be entering your password where it doesn’t belong.