Could you please point me to any research or recommendations regarding modern privacy-okay robotic vacuum cleaners?<p>Ideally:<p>* no Internet connection necessary; should pair with the mobile app over the local network<p>* no video cameras or microphones (laser scanning)<p>* no city location awareness (no GPS or location-by-WiFi capabilities)<p>* otherwise modern and robust<p>Even the "least bad" recommendation will be very helpful, thanks!