Doubletick - Email tracking for Gmail
https://doubletick.co/?utm_campaign=Hung%20Lee&utm_medium=email&utm_source=Revue%20newsletterCOOL TOOL
Issue #28
23 Apr 2020
We’ve been missing this since Sidekick went and got themselves acquired. Great little extension to track whether and when someone opens your email. Only $24 per year for unlimited. Get it now before the prices go up