The website
- day31.app and its calculators are provided as-is, for information. Visa rules, tax rules, and official sources change — you are responsible for confirming requirements with the authorities that apply them.
- Calculator output (day counts, thresholds, projected dates) is arithmetic, not legal or tax advice, and creates no advisor relationship.
- Content on this site may not be reproduced commercially without permission; linking is always fine.
The app
- The Day31 iOS app is licensed to you under the App Store Terms of Service (Apple's standard licensed application terms), not under any terms on this site. In-app purchases are governed by those same App Store terms.
- App availability and features are described on the App Store page.
Liability
To the maximum extent permitted by law, Nomikos Inc is not liable for decisions made on the basis of this website's content — including visa overstay, tax residency determinations, or filing positions. Where the law gives you non-waivable rights, this paragraph does not touch them.
Nomikos Inc · Last updated 2026. Questions: contact@day31.app.