Stick up cam sharing

Just bought 2 stick up cams after someone pryed my storm door. Never use any alarm device but my son has ring and him and his wife can see live videos one each phone For me is asking to star new on my husband's cell. Signed him up but cannot see what I see on my cell. Only if I invite, he can see to later in 7 days will have to do it again. There has to be another way. Please help.