HolidayStack: PTO Optimizer

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About this app

WHAT IT DOES
HolidayStack helps you combine your paid time off (PTO / annual leave) with public and bank holidays so you get the longest possible runs of consecutive days off.

- Smart optimizer finds the best breaks for your PTO budget
- "Next big break" suggestions ranked by efficiency (days off per PTO day spent)
- Year-end stacking (Christmas to New Year) handled automatically
- Carry-over PTO modelling with expiry dates
- Full year calendar with public holidays and your booked breaks marked
- Save vacation plans and track them from draft to booked to taken
- Export any plan as a calendar (.ics) file - open it in Google or Apple Calendar, or share it with your partner
- Custom days off (company shutdowns, birthdays, anniversaries)
- Countdown reminders so you book and depart on time
- 15 countries with regional detail: England & Wales, Scotland, Northern Ireland, US federal + states, Germany's 16 states, Canada's provinces, Australia's states, plus France, Netherlands, Italy, Spain, Sweden, Switzerland, Japan, New Zealand, India and South Africa

WHO IT'S FOR
- Employees who want to maximise their annual leave
- Couples coordinating time off together
- Anyone who plans holidays around bank/public holidays
- People who do this in a spreadsheet every January

HOW PRICING WORKS
HolidayStack is free to view holidays, keep one saved plan, and export one calendar file per month. A one-time Pro unlock adds unlimited plans, unlimited exports, multi-country switching, half-day planning and carry-over modelling.

A NOTE ON DATES
Holiday dates can change or vary locally. Dates are compiled from official government sources and updated automatically when corrections are published. Always confirm with your employer and the official national source before booking time off.

Contact: support@clearstackapps.com
Updated on
02 Jun 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Device or other IDs
This app may collect these data types
Device or other IDs
Data is encrypted in transit
Data can’t be deleted

What's new

- Added a banner on the free tier to support ongoing development.
- Minor stability and layout improvements.