Temtop vs Welcome by Virtual Doorman

Detection function: formaldehyde, PM2.5, TVOC It is equipped with British Dart formaldehyde electrochemical sensor, which effectively reduces gas interference and makes formaldehyde detection more accurate. Accurate and reliable data using the US TEMTOP laser particle sensor

With Welcome by Virtual Doorman™, residents get the best of their Virtual Doorman system and our Interactive Web Portal™ on their iPhone. See and speak to building visitors on live video with in-app calling, unlock doors with a swipe, and manage guests, deliveries and building requests quickly and easily. Bring your own cameras too. Add any RTSP-enabled camera, pair it with a door, and watch it in the app right alongside your building's cameras. The app now comes in light and dark, and is made for iPhone Duo — on the folded display the controls move to a bar on the side so live video gets more room. Overview: * See and speak to building visitors on live video * Remotely unlock common doors, elevators and apartment doors * See every building camera on one screen, one at a time or four at once * Add your own RTSP cameras — Wyze, Reolink, Amcrest, EZVIZ, Tapo and others * Add and edit your list of authorized guests * Receive notifications of guests and deliveries * View guest and delivery logs * Quickly report unwanted or suspicious activity to your Virtual Doorman and building management * Contact building management * Contact Virtual Doorman * Order new building access cards and key fobs * Upload photos of authorized guests directly from your iPhone's camera * Choose a light or dark look, or follow your iPhone's setting * Optimized for iPhone Duo * Manage account settings and preferences Please Note: Welcome by Virtual Doorman™ is only available for authorized users of the Interactive Web Portal™ who reside in buildings serviced by Virtual Service. Some functions may not yet be available to certain users depending on your building's equipment.