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Team capacity depends on record volume, concurrent edits and backend design. Test your workload before relying on a shared setup; no fixed team-size limit has been validated.
Try the fictional example workspace here. Changes in this public demo are not saved to your own Google Sheet.
Your downloaded copy includes local saving, backups and an optional Google Sheets connection. Import the included Excel template, install and authorize the Apps Script, then use manual Pull/Push. The public page has no Google Sheets sync connection.
For team use, host one protected HTTPS page connected to one shared backend. Add Google Workspace sign-in, roles and safe concurrent editing before storing private team/client data. The personal kit uses manual Pull/Push with revision checks, not automatic live collaboration. This public demo has no configured shared service.