Read the Kiwi blog post for more details. Kiwi for Gmail 3.0 or later offers expanded plug-in support, audio and video integration, a new contacts pane, and more.
The lite version of Kiwi is still a fully-fledged app, but it limits you to only two Gmail accounts. You can change the order, set your preferences for receiving notifications, and enable various plug-ins. Kiwi assigns a unique color for each account. To add a Gmail account, go to Preferences > Accounts, then click the Add ( +) button at the bottom and sign in. The right panel is your main account window.
Or, you can create new entries with a single click. The left sidebar offers quick shortcuts to Drive, Docs, Contacts, and Calendar. Kiwi for Gmail brings the entire Google experience to your Mac.