Turtl

[nebulon]

https://turtlapp.com/

Turtl lets you take notes, bookmark websites, and store documents for sensitive projects. From sharing passwords with your coworkers to tracking research on an article you're writing, Turtl keeps it all safe from everyone but you and those you share with.

[seeker]

I am always curious why turtl is not more popular. It does not seem like it has been updated much in the past few yeas. But it does have an android app
https://play.google.com/store/apps/details?id=com.lyonbros.turtl&hl=en_US&gl=US