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. 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