Fidalio is neither a Caller ID nor a Spam Detection service. It's your Personal Smart Assistant which handles all your communications on your behalf and protects your integrity without compromising on security and data breach, and make sure you never misses any of your important calls.
Being your Personal Assistant (PA) it job is to make sure you receive only relevant calls which actually meant for you. Now a days even a frequent caller is marked as a spammer and without picking the call, it's impossible to identify if it really makes a meaning to the callee. Here Fidalio comes for your help, which pre-categorises and sub-categorises the caller and act as a Gatekeeper, allowing only valid calls.