When you open an email campaign report, you see a headline tile that displays the most popular email client your contacts used to open the campaign.
To view a full breakdown of email client usage for the entire send, hover over this tile and select View more.
Alternatively, expand the MORE REPORTS drop-down menu and select Email client breakdown.
Use the Email client breakdown report
The first chart the report displays is a pie chart of email client usage for the contacts who opened the campaign. This gives you a quick visual overview of the most popular clients for your contacts.
You can drill down on individual email clients to see what versions of the client your contacts are using. To do, select the bar for the email client in the horizontal bar chart underneath the pie chart.
Specific email clients
Google Cache
On your report, you might see a percentage for Chrome and for Google Cache, and wonder what the difference is. Google Cache refers to when the client uses Google software (for example, the Gmail app on Android or iOS, and in most cases, the Gmail web application) to view the email.
Google then intercepts all image requests and routes them through its cache. Chrome is when the contact is opening the email in the Google Chrome browser and isn't associated (necessarily) with a Gmail address, for example, when viewing your BT email in Chrome.
Apple Mail
Apple’s iOS15 update introduced changes that mean that open rates for Apple Mail are likely to be inaccurately reported.
Learn more in Use clicks as the primary metric.