Read Receipts for Gmail: Know When Your Emails Are Opened
Add read receipts to Gmail with CMDK. See WhatsApp-style checkmarks when your email is opened, get a notification the moment it happens, and skip the separate tracking tool.
Split Inbox for Gmail: How to Get Multiple Inboxes as Tabs
Want multiple inboxes in Gmail without switching clients? CMDK adds a split inbox: tabs across the top of Gmail that sort your mail into lanes. Set it up in about two minutes.
10 Best Email Apps in 2026 (Superhuman, CMDK, and More)
We tested Superhuman, CMDK, Shortwave, Spark, Missive, Fyxer, Simplify Gmail, Notion Mail, Inbox Zero, and Mimestream to find the best email apps in 2026 for speed, AI, team collaboration, and price.
CMDK Affiliate Program: Earn 20% Recurring Commissions for Life
Join the CMDK affiliate program and earn generous recurring commissions by promoting the most affordable Superhuman alternative for Gmail power users. With 20% lifetime recurring commissions, 60-day cookie duration, and conversion rates that outperform competitors, CMDK offers one of the most lucrative affiliate partnerships in the email productivity space. Why Promote CMDK? Industry-Leading Commission Structure […]