Summary
This app collects, stores and transmits no personal data. The developer receives no information about you. The dates you enter are kept on your phone, in storage no other app can read, and there is nowhere for them to go — the app has no permission to use the internet.
Data collected
None. The app does not request your name, email address, phone number, contacts, location, passport or visa details, device identifiers or advertising identifiers. There are no accounts and no sign-in, and nothing is sent anywhere to be collected in the first place.
What is kept on the device
The app has to remember your dates in order to count them. For each traveller it holds a label you type — anything you like, and nothing checks it against a document — the arrival date, the date a 90-day report is next due, and which reminder it last showed. That is the whole record.
It lives in one file in the app's private storage, which on Android is readable only by the app itself. Uninstalling the app deletes it, and deleting a traveller in the app deletes that traveller's entry immediately.
Network access
The app works entirely offline. It does not declare the android.permission.INTERNET permission, so it is technically incapable of sending anything over a network. Every date it shows is worked out on the phone from the one date you gave it.
Permissions
Backup and transfer
Both are switched off deliberately. Android's automatic backup would copy the file to your Google Drive, and device-to-device transfer would copy it to a new phone; the app disables both, so your dates never leave the handset you typed them on.
That has a cost worth stating plainly: there is no copy anywhere. A lost, wiped or replaced phone loses the dates, and they have to be entered again.
Children
The app collects no data from children, or from anyone else. An adult keeping a family's dates may well type a child's name as a label; that label stays on the phone along with everything else.
Changes
Any updated version will be published at this same address with a new effective date.
Anything unclear in this policy, ask.