Hi!
I have a public app that can be opened only with the link so there is no sign-in.
Is it possible to have any data specific to the device when there are no users with email adresses?
For example is it possible to everyone to have personal notes in the app, that can only be seen on the specific device without sign-in?
Does the devices produce some kind of unique device IDs or some other info that can be used to specify the data to only that device?
I’m still a little new to this, so sorry if this is a dumb question and thank you in advance!
Short answer: No.
Larger answer: No. Not in a secure way.
Long answer: No and yes. Not secure, meaning the data will still be downloadable for other devices, but you can use the device informations to use that as a fingerprint and use that for your filters. Similar to what is done in this app:
Here’s a couple posts with my take on the whole thing. Fingerprinting a specific user or device without them signing in is complex, not 100% reliable, not 100% foolproof, and not secure as stated above. Even using the CSS Library app as an example, it seems that it often forgets who I am whenever I visit the page and have to register each time. I would love to be able to identify a specific device for one of my use cases, but the only reliable options I have are to have a separate sign in or a separate app for that device.