You can share your HomeKit configuration with all your iOS devices that are set up using the same Apple ID. On top of that, HomeKit allows guest access. Use it for family members and friends who use a different Apple ID on their iOS devices. Note that guests do have full access to view all the values of your HomeKit-enabled devices and can even control them — such as Eve Energy. Guests are not allowed to edit your HomeKit configuration or invite other guests.
HomeKit accessories, including Elgato Eve accessories, are setup with an iOS device — for example, your iPhone. To share your Eve accessories with other devices such as your iPad, you can set up other iOS devices using the same Apple ID as the master iOS device, and iCloud will sync the HomeKit setup across all of them.
Update: With Eve 1.4 helper apps for creating time triggers are no longer needed, Eve allows setting of time triggers.
As of iOS 9.2.x, location and characteristic HomeKit triggers are not yet available for Bluetooth Smart devices. Once this functionality is enabled in a future version of iOS, a free Eve app update will enable support for location and characteristic triggers.
Scenes allow you to control several HomeKit-enabled devices simultaneously with a single command–for example, switch selected devices on or off. To do so, you need switchable devices such as a fan connected via Eve Energy and/or a Hue lamp.
Eve Room goes beyond CO2 by analyzing substances that directly affect users’ well-being by using MEMS sensors to measure VOCs, in addition to measuring humidity and temperature.