Snowbirds US Day Tracker

The "Snowbirds US Day Tracker" app helps you track the number of days you're spending in the USA, which is essential to avoid being classified by the IRS as a US resident for tax purposes. Now with Companion Snowbirds support, you can track days for multiple people from one account - perfect for families traveling together. The app also features a rolling 12 month/365 day calendar to help you track how many days you have spent in the U.S. over the past 12 months/365 days.

Features include

-US Day counter
-Substantial Presence Test
-Rolling 12 month/365 day calendar 
-Cloud based database so you can login and view your data on any phone or tablet.  
-Alerts and warnings for important milestones
- NEW: The Companion Snowbirds feature lets you manage multiple travellers from one account - perfect for tracking your spouse, family members, or travel companions. Easily switch between profiles to view
  and manage each person's US day count separately.
And more

Terms and Conditions: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/