Local storage only
There is no visitor account or cloud score sync. Another phone, browser profile or private browsing session will not automatically share this record. Browser cleanup can remove it.
Keep a copy
Use Export CSV after a session and before Reset. Save the file somewhere you control. The exported sheet is a readable record; this version does not provide CSV import.
When saving is blocked
The scorekeeper displays a storage warning if writing fails. You can continue temporarily, but export before leaving. Administrator login is separate and does not back up a visitor’s scorebook.