90/180, 183/365 app for iPhone and iPad
The app helps to observe the so-called 90/180 rule imposed by most multi-entry visas (i.e. Schengen visa) and 183/365 tax residence rule imposed by most countries.
Arrival and departure days count towards the duration of stay.
Disclaimer: no rights can be derived from the information provided by the app. It comes without warranty of any kind, express or implied.