Workshop Next Service Reminder Sheet with WhatsApp List

Workshop Next Service Reminder Sheet is an offline app (one HTML file in a zip) for a garage that wants repeat business. You keep a short list of vehicles and one line per service visit. The app works out when each vehicle is next due and lists the customers to message today, leaving out those you already reminded or who have booked.

The problem it removes: Customers forget their service until the car breaks, and the workshop never calls because nobody knows who is due. The service stickers and the job cards are in the drawer. This app turns the last visit date and km into a list of who to message this week, and records the answer so nobody is nagged twice.

What is inside:

• Vehicles with owner, mobile, make and model, and a service interval in months and in km
• A service visit log: date, km, work done and amount, one line per visit
• Next due date from the last visit by months and by estimated km, with status Overdue, Due soon or Later
• A Remind now list with a ready WhatsApp message, leaving out vehicles reminded recently, booked, or opted out
• A reminder log with outcome No answer, Call later, Booked or Do not remind, and the booked date
• A month calendar of services due, a printed due list and a printed reminder card
• 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: small garages, tyre shops and mobile mechanics who want customers to come back for the next service and do not need a full job card system.

What it is NOT: It does not make job cards, estimates or invoices: use the Zeyto garage job card pack for that. It does not know the real odometer, so the km due date is an estimate from the km per month you enter. Reminders are not sent automatically. 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 (131 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 1379 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).