"The SimpliSafe system comes with three modes: Off, Home, and Away. Setting the system to “Off” completely disarms it. The “Home” setting arms the system, but leaves out any motion sensors. The “Away” setting arms everything."
Boom! I haven't actually set mine up yet as I haven't moved, just found the above from Google. As we are likely to be up and down in the night (young kid) I'll probably stick with the default.
"The SimpliSafe system comes with three modes: Off, Home, and Away. Setting the system to “Off” completely disarms it. The “Home” setting arms the system, but leaves out any motion sensors. The “Away” setting arms everything."