Google Workspace add-ons

Small tools, done properly

base:10 builds focused Google Sheets add-ons that solve one problem well — no bloated dashboards, no unnecessary permissions.

Custom Count & Sum

38 custom functions for Google Sheets. Count and sum by font color, background color, or font style — no scripts needed.

Automatically stamp a timestamp — or your own custom value — into a cell whenever you edit a watched column, based on conditions you configure.

Keep a range in sync — live, in both directions — across two or more spreadsheets. Auto, manual, or scheduled, no formulas or scripts needed.