Can I unlock my phone with voice command?

I have a Samsung Galaxy Edge with Android 7.0. I want to rule my phone with my voice without touching it even if it's locked. I mean some basic functions, like unlocking the phone. So whenever I say my secret word my phone will unlock, or if I say "how many notifications" it will say "no new notifications" for example (without unlocking the phone). Is this possible or is there an app for this?