How long do people take to react to smartphone notifications?

Notifications are one of the most essential features of smartphones. App developers and researchers typically want to reach their audience at opportune times. We analyzed almost 10 million notifications collected from 922 users. Most notifications were logged in the late morning and late afternoon. Between 8 pm and 11 pm, the interaction delay (time between notification and reaction to notification) is the lowest – which could mean that this is the most opportune time to schedule notifications.

For more details, you can find the full article here.

Z-scores for the mean interaction delay (gray), median interaction delay (red), and the record count (orange) per time of day in hours. Median reaction time and record counts are below average between (6) and (7), so between 8 pm and 11 pm, making this a promising window to schedule notifications. For full description, please see the full paper.