I want to create an app (a reminder app) that users can set their settings like:

Meeting date: 8:00am things to bring: water, food, ballpen, paper people to bring: Oliver, Anna, Bryan, Jack

and users can share their settings.

for example I am Oliver and I set those settings. I want to share those settings for Anna to. Then I can send it to her via bluetooth or via download link, or even sync it with her google account.

then those settings will be applied to her app too.

how can I do it this way guys? Any reference, tutorials, similar apps?

I also want my settings to have its own extension like oliver_settings.nem