Downfor Sheets monitors every edit and alerts you when formulas break, duplicates appear, or data quality drops. Daily health reports by email — no manual checks needed.
Install from Google Workspace MarketplaceFree · Alerts on every edit · Daily email reports · Runs entirely in Google Sheets
Once enabled, Downfor Sheets runs in the background — scanning on every edit, emailing daily reports, and alerting you the moment data quality drops.
| A | B | C | D | |
|---|---|---|---|---|
| Order ID | Name | Qty | Total | |
| 2 | ORD-1001 | Alice | 5 | =B2*C2 |
| 3 | ORD-1002 | Bob | 3ea | =B3*C3 |
| 4 | ORD-1001 | Alice | 2 | 150 |
| 5 | ORD-1004 | Charlie | 8 | =B5*C5 |
Spots cells where a formula should be but a plain value was pasted instead.
Flags formulas that don't match the column's pattern — before they produce wrong numbers.
Catches duplicate values in key columns as they appear.
Alerts when text sneaks into a numeric column and breaks calculations.
Detects when someone renames or moves a column header from the saved baseline.
All five checks run on every edit and in daily scans — no manual triggers needed.
Add Downfor Sheets from the Google Workspace Marketplace. One click, no account needed.
Turn on auto monitoring from the menu. Pick your alert threshold.
Downfor Sheets scans on every edit and emails you a daily report. You'll know the moment something breaks.
Downfor Sheets runs entirely within Google Apps Script on Google's servers. No external APIs, no third-party services, no tracking. Alerts are sent through your own Gmail.
No subscription, no premium tier, no usage limits. Install it, use it, uninstall it whenever you want. No account creation required.
The add-on uses the most restrictive OAuth scope available: currentonly. It cannot access your other spreadsheets, Drive files, or any other Google data.
Yes. Completely free with no subscription, no premium tier, and no usage limits. There is nothing to pay for.
Five types: missing formulas, inconsistent formulas, duplicate values, mixed data types, and header drift. All five checks run automatically on every edit and in daily scans — no manual triggers needed.
Every cell change triggers a health check with a toast notification showing your score. A full scan runs daily at 8 AM and emails you a styled report. You can set a threshold to get an immediate email alert when your score drops below a level you choose.
Yes. Downfor Sheets runs entirely within Google Apps Script on Google's servers. Your data never leaves Google's infrastructure. The add-on uses the currentonly OAuth scope — only the open spreadsheet, nothing else. Alert emails are sent through your own Gmail — Downfor never sees or stores them.
Yes. Any collaborator can run manual scans. Monitoring features (auto-scan, daily reports, threshold alerts) can only be enabled or disabled by the spreadsheet owner.
Install from the Marketplace, enable monitoring from the menu, and set your alert threshold. Your first health report arrives the next morning.