Estimate only. The calendar is built from the pattern and date you entered. Always check against your contract, approved shift system or collective agreement before making decisions.
Set up your shift
Once and you're done. It's saved on this device only.
How it works
Three answers and you stop counting days on your fingers.
1. Pick your pattern
4x4, 7x7, 14x14, 2-2-3, DuPont, days-nights-off, or whatever your site runs. If yours isn't listed, you build it day by day.
2. Name a day you remember
Any date you're sure about — "last Monday I was on days" — and where it fell in the cycle. That anchors the whole calendar, forwards and backwards.
3. Open it and that's it
Every time you come back you'll see, in large type, whether you work or rest today, when you start or finish, how long is left, and when your next day off and next full weekend fall.
It stays on your phone
Your setup is saved in your device's browser. No account, no server, nothing sent anywhere. You can download a backup any time and carry it to another phone.
The shifts you can set up
These come ready. Anything else you build by hand.
4x4, 7x7 and 14x14
The site patterns. Four days on and four off; or seven and seven; or fourteen and fourteen, typical of mining and jobs with a long journey in. The question people ask most with these is when the next full weekend off falls, because it moves every cycle: you'll see it worked out on the main screen.
Days, nights and rest
Rotations of four days, four nights and four off, or two and two. The tricky part is the night shift that crosses midnight: if you start at 20:00 and finish at 08:00, the shift belongs to the day it started. At two in the morning the app will still tell you you're working, with the hours you have left — not that a new day has begun.
2-2-3 and DuPont
Long cycles, fourteen and twenty-eight days, on twelve-hour shifts. They're the hardest to keep in your head, because the pattern never lines up with the week. DuPont ends with seven days off in a row.
5x2 and 6x1
Retail, hospitality and more traditional hours, where what helps is seeing the month's running total and which bank holidays you're rostered on.
Frequently asked questions
Do I have to sign up?
No. No account, no email, no password. You set up your shift and it stays on this device.
Does my data go to a server?
No. Everything is stored in your browser, on your phone or computer. If you clear your browser data the setup is lost, which is why you can download a backup whenever you like.
Does it work without internet?
Yes, after the first visit. The calendar is worked out on your own device, so it keeps working on site or underground.
What about night shifts that cross midnight?
They're treated as one shift belonging to the day it starts. If you clock on at 20:00 on Monday and finish at 08:00 on Tuesday, at three in the morning the app will tell you you're still on Monday's shift and how many hours are left.
What about daylight saving?
The shift cycle is counted in whole days, not hours, so a clock change doesn't shift it. It's a classic bug in calculators built in a hurry, and it's covered by tests here.
Can I mark holiday or a one-off change?
Yes. You can mark a specific day as holiday, leave or training without breaking the pattern: the cycle carries on and only that day changes.
Does it work out my pay?
It can estimate hours and premiums, always showing the formula used. But it's an estimate: it doesn't replace your payslip and it isn't employment advice. The rules change with contract, approved shift system, collective agreement and legislation.