For snowbirds, remote workers and anyone with two homes
Know your days in every state.
Log where you sleep, work and travel. See how close you are to each state's residency day line, and keep a day-by-day record that holds up in an audit. Your log stays on your device.
The year so far.
Where the calendar stands today, and how the states draw their lines.
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Residency rules at a glance.
How the states that tax income draw the line.
Everything you need to prove where you live.
Explore Aeonis Residency Days.
Features
Counts, calendar, check-ins, reports. See all features.
Use cases
Snowbirds, movers, executives. Find yours.
Federal test
For non-citizens. Try the calculator.
A day counter you can trust
Every state's day test
The 183-day lines, the home requirements and the states with no day test at all, written in plain English with the statute for each.
Counted the way states count
Any part of a day counts, so a travel day counts in both places. Gaps in your log are flagged before they become a problem.
Private by design
No account and no tracking in the background. Your log lives in your browser; Pro sync is end-to-end encrypted.
Get Pro updates
Pro adds encrypted sync between devices, photo and CSV import, the audit report and share links for your accountant. Leave your email and we'll write once when it's available.
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