Method and system for cross device notification (CDN) are provided. An incoming event is received at a first device associated with a user. The first device detects one or more active devices associated with the user other than the first device. Whether the user reacts to the incoming event is detected on the first device. Whether a CDN is needed is determined based on whether the one or more active devices are detected and/or whether the user reacts to the event within a predetermined time period. If a CDN is needed, the CDN is generated and transmitted to the one or more active devices.