Do you know how many days you've spent in each state this year? Your tax bill depends on it. Tax Days tracks your days against the residency rules that matter, so you always know exactly where you stand. Track automatically in the background, or log trips by hand. Either way the app does the math across US states, the federal Substantial Presence Test, Schengen 90/180, the UK Statutory Residence Test, and more. AUTOMATIC OR MANUAL, YOUR CHOICE Turn on auto-tracking (Pro) and Tax Days detects…