It actually does use IMAP! The app connects directly to Google's IMAP servers via SSL straight from your machine.
I intentionally chose a local IMAP pipeline over the official Gmail API because of platform gatekeeping. To use the API for this, Google forces independent developers into a "Restricted Scope" tier, which requires an annual $15,000+ third-party security assessment.
Going the local IMAP route lets me bypass that completely while keeping user data 100% local and secure.
I don't like how somebody is flagging/downvoting all your comments. This is about your product; it's highly relevant, whatever somebody might think about it.