Why Maintenance Reminders Should Reset From Completion Date, Not Schedule

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A recurring reminder anchored to a fixed calendar date can drift out of sync with reality when tasks are completed late — for example, a 90-day HVAC filter reminder completed 17 days late will next fire only 73 days after the actual change. A more accurate approach sets the next due date relative to when the task was actually completed, using the formula: nextDue = completedAt + interval. Overdue tasks should remain visibly overdue rather than auto-advancing, since silent completion hides the fact that work still needs doing. Not all reminders suit this model — fixed-season or compliance deadlines should remain calendar-relative — but maintenance jobs tied to elapsed time benefit from completion-relative scheduling. An indie developer built an Android app called Maintenance specifically around this workflow, allowing users to log completions and automatically recalculate the next due date from that point.

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