Motion sensitivity adjustment

I have the Ring Pro video doorbell. I have an Android phone, and my wife has an iPhone, and also an iPad. Each of these devices has the Ring app installed on it. Do I have to adjust the motion alert area on all my devices seperately? Or does adjusting the area on one device affect all my other devices? Also is there a way to silence motion alerts for several hours? My wife gets motion alerts on her iPhone while she is at work, at full volume, with apparently no way to turn it down, and it's very distracting to her co workers.