This just polls every x (default 30) seconds; if you use IMAP you can do better with IDLE (e.g. I pipe `fetchmail --check` to something that triggers a sync to immediately get new mails)
What tool makes these readme’s for new github repos that are bulletpointed lists with features, always prefixed by an emoji?
If I read it right, it's built on Gmail API
Are there any other provider agnostic tools with similar capabilities?