A calendar for your working days
Record day categories and private notes. Keep the information you will need when checking your working-location history.
Meskatech / FrontierDay
Working in Luxembourg while living in France means keeping a clear record of where you work. FrontierDay replaces scattered calendar notes with a simple annual view of working days outside Luxembourg, including remote-work days.
Free on iOS and Android, with optional tips.
A record-keeping tool, not tax, legal or social-security advice. Verify applicable rules with official sources or a qualified adviser.
FrontierDay
Record day categories and private notes. Keep the information you will need when checking your working-location history.
Review the annual count and alerts against your chosen threshold. The app helps track days; it does not decide which rules apply to your personal situation.
Export CSV for your own records or to discuss with an adviser. Core tracking stays on your device and works offline.
The full app is free, with optional tips. No account, advertising or analytics, and no automatic cloud ledger.

FrontierDay
Record each working day's category in FrontierDay and review the annual total. Keep supporting records and check which days and thresholds apply with your employer or adviser.
No. FrontierDay records days and compares them with a configurable threshold. Tax and social-security rules are separate, and the app does not calculate tax or certify compliance.
That is its initial use case. Do not assume its settings cover another country's rules: verify your own situation before choosing a threshold.
Free on iOS and Android, with optional tips.