Workorder → service reminder.
Fill in the customer, the service date, and tick which services were done. The reminder email and next-service date are worked out for you — all in your browser, nothing uploaded. Got a screenshot handy? Attach it and it’ll try to fill the form in for you.
Service details
Reminders due
Getting the reminder out: a web page can’t silently send mail, so each reminder gives you Open in email (a pre-filled draft in your mail app, ready to send), Copy text, and Add to calendar (an .ics file dated to the due date). Auto-fill from a screenshot needs internet, which some in-app preview windows block — if it won’t read, just type the details, or download this file and open it directly in your browser. Want it to send automatically on the due date instead of you clicking? That needs a small backend — say the word and I’ll build it.