Inbox SpySee the cadence behind the emails.
Enter when you subscribed and when each message arrived. Get a sorted timeline, time to first email, the gaps between sends, and the median gap without building a spreadsheet.
Sequence timestamps
Up to 50 emailsAll times are interpreted in your device's local timezone. Use the received time shown by the same email account for every entry.
Emails received
Your dates and subjects stay in this browser. No account or upload is required.
Sequence analysis
Add timestamps or try the example to see the timeline.
How to read the timing
Time to first email is measured from subscription to the earliest received message. Each send gap measures elapsed time from the previous email, while the median gap is the middle gap after sorting. For an even number of gaps, it averages the two middle values. The sequence span runs from the first received message to the last.
Local times can cross a daylight-saving transition; elapsed hours reflect that change. This calculator uses the timestamps you provide, so it cannot distinguish a scheduled delay from delivery delay, inbox filtering, or a trigger caused by your actions. Recheck the source email headers if exact delivery timing matters.
For a useful competitor comparison, pair cadence with each message's purpose and CTA. The welcome sequence analysis guide shows what to record beyond the clock.
Keep the timeline updated automatically.
Use a tracking address in Inbox Spy to collect future emails into a company sequence you can search and compare.