Is there a kind of app compatible/comparable to webos?

what it does?
1. does memos/notes like palm memo
2. it has an online counterpart, hence the need to back up is not needed, syncs online.
3. can be viewed even if the phone is offline
4. when notes are edited when phone is offline, it will sync once there is coverage.
5. edits online and in the phone are synced.

I have tried evernote, but i cannot view notes when phone is offline. It is also sluggish.

other options have no online counterpart. i dont want to deal with backing up.

thanks for the suggestions