Samsung Flow - Android and Windows Apps.
Boomerang Respondable - Write perfect emails with Artificial Intelligence
Right Inbox - Schedule Emails in Gmail To Be Sent Later
Mailbutler - Mailbutler adds lacking functionality to email clients and increases your productivity
Huawei Mobile Services - Huawei Mobile Services app comes up with features to help you in accessing a large number of advanced features such as payments, push notifications, and Huawei ID, etc.
Wordzen - We write your emails for you. Literally.