Is there a note taking application with features = { encrypted + android + ios + web frontend } ?

[citykid]

evernote has no serious encrpytion, I expect that every note is automatically encrypted on the client, synching with dropbox, google drive or so would be perfect.

 

[Petegunns]

Google Keep - its worth trying out, as it is a legitimate alternative to evernote, and seamlessly syncs with all things Google.

 

[citykid]

Very good answer, did not know it has encryption, there is just a "but":

To encrypt notes with google Keep, you need to be signed in into chrome. And this means for me, that google tracks all my daily internet moves even better than they do anyway.

Thank you for the hint, more ideas are still welcome to escape googledom at least somewhat.

As of today, google keep has no ios.