thx for help but still doesn´t work. says i should check sudo password and network. i still not sure what a sudo password is... do i have to forward ports on my router? does the raspberry have to be logged out? how do i find out the ssh user name? and what is a ssh password and how can i find it out...

Hi everybody! I have bought a raspberry pi 2b and want to connect it to my smartphone via some apps (e.g raspi check).. the raspberry is connected via cable to the router. smartphone is connected via w-lan. the problem i think is the app: it recommends a name: which name? ssh port: 22 is default (i ...