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Checker Plus for Gmail vs Mia for Gmail: catalog facts
Checker Plus for Gmail	Mia for Gmail
Free Free to use, with optional donations unlocking extra features.	Freemium Free to download, with a low-cost premium version.
Browser extension	macOS
Handles several Gmail accounts from one popup without opening tabs Desktop notifications with actions, including archive and delete	Quick access to Gmail from the menu bar Multiple Gmail accounts
Requires broad access to your Gmail account Closed source, with optional paid donations unlocking extras	Gmail only macOS only
Browser extension	Downloadable app
Closed source	Closed source
License not stated	License not stated
Account needed	Account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.