What are some alternatives?
When comparing Kiwi for Gmail and PopTrayU, you can also consider the following products
Shift - Shift is the ultimate email client for managing Mail, Calendar, Drive, Slack, Asana, Jira, Evernote, and all your other favourite apps
nPOPuk - nPOPuk is an ultra-small, but comprehensive, e-mail client that runs on a wide range of...
Airmail - Airmail is a lightweight and lightning fast mail client for Mac.
Mia for Gmail - A desktop email client for your Mac, without a browser !
Mailbird - Mailbird is the best email client for Windows 7, 8 and 10
POP Peeper - POP Peeper is an email notifier that runs in your Windows task bar and alerts you when you have new...