In the app
No typing in dates
Residency reads your trips from your photo library, so the count starts from where you have really been.
You can spend up to 90 days in the Schengen area in any 180-day period. The window is rolling: for any date, look back 180 days including that date and count the days you were inside. The day you arrive and the day you leave both count.
An overstay is recorded at the border when you leave. Counting by hand goes wrong at the edges of the window, where old trips are still dropping out day by day. Residency recounts the window for every date and warns you before a trip would cross the line.
In the app
Residency reads your trips from your photo library, so the count starts from where you have really been.
For any date, look at the 180 days ending on that date and count every day you were in the Schengen area, including arrival and departure days. The total must not exceed 90.
Yes. Both the day you enter and the day you leave count as days in the Schengen area.
A day stops counting once it is more than 180 days in the past, so days return one at a time as the window moves forward.