Yes! You can log into the app on multiple devices, however, your Base Station is registered to the first account that set it up, so make sure you are all logging into the app using the same email and password to get in. Only attempt this AFTER first fully setting up and registering the device. We also don't recommend having too many people logged into the same account as this can cause things to slow down. Once you get above 2 people getting the same data from the same device, things can start to be a bit more sluggish.
Can My Spouse or Caretaker See My Baby's Data Without Having to Use My Phone?