How we tested

Reviewing this suite of Mac email apps did not require any particularly outlandish testing methodology — we just used all the apps as we normally would. We imported our email accounts (or, in the case of Hey, set up a new account and created some redirect rules), checked our inboxes, replied to new emails, and tried to organize our messages. We also installed the apps on an iPhone and an Apple Watch to test their functionality on Apple’s other devices.