Duty Roster Maker for Fixed Posts and Weekly Patterns

Duty Roster Maker for Fixed Posts and Weekly Patterns is an offline app (one HTML file in a zip) for a supervisor who repeats the same pattern of shifts and days off for every post and redraws the roster each month. You define shift types and patterns once, give each person a roster line (a post, a pattern and the date the cycle starts), and the app generates the month roster for every person and post. You change single days by hand and the rest stays on the pattern.

The problem it removes: The same pattern of days off and shifts is redrawn every month in a spreadsheet or on paper, a leave request leaves a post thin, and a person ends up with seven days in a row or a night shift followed straight by a morning shift without anyone noticing until it happens. This app builds the month from the pattern and shows the gaps and the tired spots before the roster goes out.

What is inside:

• Pattern builder: a cycle of 1 to 28 days, each day a shift or a day off, with quick starts such as 5 on 2 off and 4 on 2 off, and paid hours per week worked out for you
• Roster lines: a person, a post, a pattern and the date the cycle starts, with a start and an optional end date so people can move between posts
• Month roster grid per person grouped by post, with day, hours, a cover table by post and shift, and flags where a rule check needs a look
• Cover needed: how many people each post needs on each shift, optionally only on some weekdays, with the gaps counted for every day
• Checks against limits you enter: days in a row, days off in any 7 days, hours in any 7 days and rest between shifts, including night shifts that cross midnight. A limit left blank switches that check off
• Swaps, leave, sick days and one-day shift changes that override the pattern, with a preview of what a swap does to the checks and an Undo
• Printable A4 landscape roster with the shift legend, cover gaps and signature lines
• Example data you can load in one click, a Start here guide and an Honest limits panel
• JSON backup and restore, CSV export, and CSV import with a check of every row before anything is added

Who it is for: supervisors and managers of guard posts, building services, reception desks, restaurants, clinics and shops who keep a repeating pattern of shifts and days off and need to see cover and rest problems before they publish the month.

What it is NOT: It does not know any labour law, rest rule or working time limit: every limit is a number you enter in Settings from your own contract or rules, and the example numbers are only examples. It does not publish the roster to staff, take requests, record attendance or clock-ins, or calculate pay. It is not legal, tax or accounting advice, it is not connected to any government system, bank or messaging service, and it does not file or send anything by itself. UAE e-invoicing is not part of it.

Your data stays on this device in your browser. Back it up with Export; clearing browser data loses it otherwise.

Verified by us: scripted tests in Chromium (187 checks through the real screens: adding, editing and deleting records in every table, required-field messages, backup then clear then restore, CSV export then import, keyboard order, print layouts rendered to PDF, no horizontal scrolling at 375 and 1280 pixels, no network requests) and an independent recalculation by a separately written Python evaluator of 186 calculated values (25 randomised rows plus the example data) with 0 mismatches. Safari engine (WebKit): smoke test passed; Firefox: could not be launched. Not tested: Firefox beyond what is stated here, and no real printer was used (print layouts were checked as PDF).