DaysHere counts your travel days country by country and shows how many are left: Schengen 90/180, calendar-year caps, days-per-entry limits, or a rule you define. Log your entry and exit dates and it gives you the days remaining, the date you have to leave by, and reminders before the deadline. There is a monthly calendar, the full history of every stay, and a home-screen widget. Everything runs on device, so there is no account and your travel history never leaves your phone. Free, iPhone.
I kept recounting my Schengen days in a spreadsheet and never quite trusted the number, so I built DaysHere.
You register each country's entry and exit dates plus the rule that applies to it, and it shows the days left, the date you have to leave by, and a warning status. Four rule types cover most borders: fixed days per entry, a rolling window (Schengen 90/180), a calendar-year cap, and a custom rule.
It runs entirely on device. No account, no server holding your travel history. Free, iPhone only for now. Happy to answer anything about how the counting works.