Thanks for the comment. You can lose access only if you clear your browser cache or lose the device and also did not save the notebook URL anywhere. The notebook lives at one unique link, so saving that link keeps it safe even if the device is gone.
If someone loses both the cache and the URL they can contact us at support@clipnotebook.com and we try to help recover it.
I wanted the tool to stay simple with no forced accounts, but I may add an optional backup option later for extra safety.