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Mia for Gmail vs Checker Plus for Gmail: catalog facts
Mia for Gmail	Checker Plus for Gmail
Freemium Free to download, with a low-cost premium version.	Free Free to use, with optional donations unlocking extra features.
macOS	Browser extension
Quick access to Gmail from the menu bar Multiple Gmail accounts	Handles several Gmail accounts from one popup without opening tabs Desktop notifications with actions, including archive and delete
Gmail only macOS only	Requires broad access to your Gmail account Closed source, with optional paid donations unlocking extras
Downloadable app	Browser extension
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 October 2, 2026	Official website Full listing and sources Checked September 22, 2026

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