Sent a proposal?
See when the message shows an activity cue, then time the next note — without a CRM.
Gmail on your computer · no account
Never wonder when to follow up.
See an activity cue next to messages you send in Gmail, then set a reminder for the right moment. SentCue Email Tracking is a Chrome extension — install once, no login, history stays on this device.
Add to Chrome See how it works
Gmail on a computer (Chrome, Edge, Brave, Opera, Vivaldi) · Not the Gmail mobile apps · Free today
How it works
Send. See the cue. Follow up.
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Proposal — Acme Inc.
Just sent
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Same thread
Waiting
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Budget overview
Activity cue
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Your next step
Follow up tomorrow? Remind me
For mail that actually matters
Waiting on a client?
Set a reminder only if there has not been an activity cue yet.
Built for freelancers, consultants, and one-thread follow-ups — not campaigns.
Privacy by design
Your email stays in Gmail
Subject, recipients, message content, and attachments never reach SentCue. Tracking uses a random ID and timestamps — same pixel idea as other trackers; an activity cue is not proof the recipient read the mail.
Only a random ID and cue timestamps leave this device
On this device
Private and local
- Recipient and subject
- History and reminders
- Follow-up status
SentCue server
Minimal cue data
- Random tracking ID
- Cue timestamps
- No email content
Free today — details on Pricing.
Full data mapWhy SentCue
Activity cues in Sent — without a suite
You get circles in Gmail Sent, local history, and reminders on this browser. No SentCue account, no Gmail OAuth, no promotional footer. Suites (campaigns, mail merge, mobile apps, cloud dashboards) are a different job — compare when you need them.
Guides
Start here
Questions
Common questions
Is an activity cue proof someone read the email?
No. A blue circle means the tracking image was requested after Send. Image proxies and scanners can create a cue. Opening that message in Sent on this computer does not. A phone or another computer still can. Blocked images create silence. Detail: how tracking works.
Will the recipient know?
There is no “tracked by” footer. Recipients do not install anything. Their client may still load a remote image, show an images warning, or expose the image URL in the HTML. We do not claim they cannot notice.
What data leaves the browser?
See the diagram above: random ID and timestamps only — not subject, body, or recipients. Jump to privacy.
Does it work on mobile Gmail?
No. Use Gmail on a computer browser (Chrome, Edge, Brave, Opera, or Vivaldi). The Gmail apps on iPhone and Android are not supported.
Does Scheduled Send work?
Scheduled Send is not tracked. The email still goes out at the chosen time.
Stop guessing when to follow up.
Add SentCue Email Tracking to Chrome. Free today · Gmail on your computer · no account.