Peak mobile times are early morning and late evening, so send times should consider subscribers who primarily use mobile. People generally click less on mobile than desktop due to usability, trust, and time constraints. While some think people will open messages later on desktop, data shows just 2-3% of emails are opened on both platforms, so the first open is the main opportunity to engage users. One brand saw 16% of click-throughs from people who didn't fully open or download images in emails. For one customer studied over 30 days, 60% of email opens occurred only on mobile devices.

34. Peak mobile times are early morning and late evening. For a mobile-
heavy subscriber base, this might bear heavily on your send times.
People generally click less on mobile devices than they do on desktop.
Many factors contribute to this: usability, trust, and time, to name a few.
People don’t open later on desktop. Unfortunately, mobile triage is a
myth, according to our data. Just 2-3% of emails are opened on two
different platforms—so the first open is your one chance to impress.
For one brand we studied, 16% of click-throughs were from people who
didn’t even open or download images!
60% of people who open emails are opening only on mobile, according to
data based on one customer’s daily sends for 30 days.