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CellAlert
Never miss a deadline — straight from your Excel sheet.
CellAlert turns a date in your Excel sheet into a monitored deadline — and reminds you in time, even when Excel has long been closed. No migration, no rebuild: Excel stays the source of truth, CellAlert just adds the reminders. The alerts don't live inside the file but outside it — lose the Excel or delete it, the deadline stays. One connected suite: an Excel add-in, a web app and (in progress) native apps for macOS and Windows. CSV export anytime, no lock-in.
— How it works
Never miss a deadline
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Jun 12, 2026
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89
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59
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43
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CellAlertReminder
Jun 12, 2026due
EmailCalendarApp
Somewhere in your spreadsheets.
Never miss a deadline.
Lose the file — the deadline stays.
Tech stack
- Next.js
- │ TypeScript
- │ Office Add-in
- │ Supabase
Platforms
- Web
- │ Excel
- │ macOS
- │ Windows
Tags
- Excel
- │ Deadlines
- │ Reminders
- │ B2B
